scholarly journals Development of a innovative solution for energy recovery from the flow exhaust gas on bench test facility of turbofan aircraft engine through the use of innovative design methods: Definition of the process and the operating environment

2019 ◽  
Vol 286 ◽  
pp. 02003
Author(s):  
Amine Rahoui ◽  
Zinab Aalaoui
Keyword(s):  
Alternative Fuels ◽  
Aircraft Engine ◽  
Research Process ◽  
Test Facility ◽  
Civil Aviation ◽  
Maximum Efficiency ◽  
Bench Test ◽  
Technological Solution ◽  
Operating Environment ◽  
Definition Of

Civil aviation is driven nowadays by exceptional growth in the number of passengers. It should double or even triple by 2050 and thus, all industrials also plan to double the number of device delivery by mid-century. Responsible for about 2% of carbon dioxide on the planet, they must now deal with the environmental issues facing the sector. At this moment in the world, several lines of research focus on increasing the efficiency of aircraft engines, development of new engines, efficient technologies, sustainable sources of alternative fuels and improved management air traffic on the ground and in flight [1]. The present work deals with a research focused on the engine test when passing in review in repair facilities. This operation which consist in making engine running while the cycles to test its performance in a test bench are studied to define a technological solution to reduce CO2 carbon footprint of the aircraft engine in this phase of the cycle of life. The idea is to produce electrical energy during these tests. To achieve this, we will highlight the case of a type bench facility for a specific airplane engines. As a result high-performance analysis tools are implemented to define the most suitable technological solution that ensures maximum efficiency, meets the functional and regulatory requirements taking into account the force of integration with the existing and cost optimization. In this paper we present the summary of the working definition of the research process for the final term set in the operating environment integration relevance that provides bench test and level of innovation that provides the methods selected.

Sea Level Performance of a CF-700 Engine Core With Alternative Fuels

2015 ◽  
Author(s):  
Craig R. Davison ◽  
Pervez Canteenwalla ◽  
Jennifer L. Y. Chalmers ◽  
Wajid A. Chishty
Keyword(s):  
Sea Level ◽  
Alternative Fuels ◽  
Engine Performance ◽  
Performance Testing ◽  
Aircraft Engine ◽  
Test Facility ◽  
Engine Fuel ◽  
Subsequent Test ◽  
Energy Independence ◽  
Engine Testing

The use of alternative fuels has the potential to enhance energy independence and reduce environmental impact of air travel. It is important to characterize gas turbine operation using such fuels under controlled conditions before implementing them in flight. The performance of a CF-700 engine core was examined in a sea level test facility. The following fuels were tested and will be reported on: 1. Jet A-1 – baseline fuel 2. 100% unblended Hydroprocessed Esters and Fatty Acids (HEFA) synthetic kerosene fuel with aromatics (SKA) 3. 100% unblended Fischer-Tropsch (FT) synthetic paraffinic kerosene (SPK) 4. Blended 50% HEFA-SPK and 50% Jet A-1 Fuel 2 above is an alternative fuel that can potentially be used without blending with conventional fuel. One purpose of the static engine testing was to determine if this fuel was suitable for use on subsequent test flights in a Dassault Falcon 20 aircraft. Engine performance testing was conducted at various power settings for each fuel. Relevant plots of performance are presented, compared and discussed. Transient tests were also performed including slams and chops. Observations of the effects of the different fuels on the engine fuel system are presented as some alternative fuels have the potential to cause seals to shrink and leaks to occur. The leaks observed are noted as are the steps taken to mitigate the problem.

Context in Action and How to Study It

2019 ◽  
Keyword(s):  
Social Science Research ◽  
Science Research ◽  
Research Process ◽  
Care Patient ◽  
Organizational Life ◽  
Integration Of Care ◽  
Research Experiences ◽  
Organization And Management ◽  
Care Outcomes ◽  
Definition Of

The concept of context is a cornerstone of a large part of social science research, particularly in organization and management studies, yet it has received little theoretical and methodological attention in lieu of its relevance. This book offers a definition of context as a theoretical construct, a discussion of the methodological implications of this, and a framework for how to reflect upon and operationalize the role of context in the different stages of a research process, from formulating research questions to analyzing and writing about results. The chapters presented here integrate lessons derived from various research experiences across the complex and dynamic field of health care. Contributors share their experiences with theorizing about and empirically studying significant organizational phenomena such as implementation of policy, organizational change, integration of care, patient involvement, human-technology interactions in practice, and the interplay between work environment and care outcomes in eldercare. These contributions exemplify how a nuanced approach to context might unfold in different fields, through different designs, methods, and analytical lenses. Relevant to researchers and practitioners, within both healthcare, organization and management studies, and the social sciences more broadly, this book leaves the reader with a practical framework from which to carry out contextual research and analysis and a gain deeper understanding of the significance of context in organizational life.

The operational efficiency of passenger aircraft

2006 ◽  
Vol 78 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Donald McLean
Keyword(s):  
Design Methodology ◽  
Operational Efficiency ◽  
Civil Aviation ◽  
Content Type ◽  
Transport Economics ◽  
Load Factors ◽  
Consistent Assessment ◽  
Definition Of ◽  
Passenger Aircraft ◽  
Practical Implications

PurposeTo provide for the use of airlines and other civil aviation organizations a practical definition of operational efficiency and to show how it can be determined.Design/methodology/approachA brief account of air transport economics is used to demonstrate how bom load factors and aircraft utilization need to be considered in assessing operational efficiency. Then other efficiencies are treated briefly before an example is given of how the better of two fictitious aircraft can be chosen for a particular route. A second example involving the calculation of the operational efficiency achieved by an imaginary airline is also given to show that the typical value is lower than might be expected, particularly in view of the relatively high load factors involved.FindingsProvides performance values and economic figures which are typical of current airline operations.Practical implicationsUse of the proposed definition will allow the consistent assessment of the economic performance of airlines.Originality/valueAt present there is no definition of operational efficiency in general use although it is greatly needed by airlines. The definition proposed in this paper is practical and easy to use.

A Flight Simulation Vision for Aeropropulsion Altitude Ground Test Facilities

2005 ◽  
Vol 127 (1) ◽  
pp. 8-17 ◽  
Author(s):  
Milt Davis ◽  
Peter Montgomery
Keyword(s):  
System Performance ◽  
Engine Performance ◽  
Aircraft Engine ◽  
Flight Simulation ◽  
Propulsion System ◽  
Test Facility ◽  
Flight Testing ◽  
Test Environment ◽  
Ground Test ◽  
Aircraft System

Testing of a gas turbine engine for aircraft propulsion applications may be conducted in the actual aircraft or in a ground-test environment. Ground test facilities simulate flight conditions by providing airflow at pressures and temperatures experienced during flight. Flight-testing of the full aircraft system provides the best means of obtaining the exact environment that the propulsion system must operate in but must deal with limitations in the amount and type of instrumentation that can be put on-board the aircraft. Due to this limitation, engine performance may not be fully characterized. On the other hand, ground-test simulation provides the ability to enhance the instrumentation set such that engine performance can be fully quantified. However, the current ground-test methodology only simulates the flight environment thus placing limitations on obtaining system performance in the real environment. Generally, a combination of ground and flight tests is necessary to quantify the propulsion system performance over the entire envelop of aircraft operation. To alleviate some of the dependence on flight-testing to obtain engine performance during maneuvers or transients that are not currently done during ground testing, a planned enhancement to ground-test facilities was investigated and reported in this paper that will allow certain categories of flight maneuvers to be conducted. Ground-test facility performance is simulated via a numerical model that duplicates the current facility capabilities and with proper modifications represents planned improvements that allow certain aircraft maneuvers. The vision presented in this paper includes using an aircraft simulator that uses pilot inputs to maneuver the aircraft engine. The aircraft simulator then drives the facility to provide the correct engine environmental conditions represented by the flight maneuver.

scholarly journals Emission Reduction of Fuel-Staged Aircraft Engine Combustor Using an Additional Premixed Fuel Nozzle

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Takeshi Yamamoto ◽  
Kazuo Shimodaira ◽  
Seiji Yoshida ◽  
Yoji Kurosawa
Keyword(s):  
Technology Development ◽  
Pressure Ratio ◽  
Aircraft Engine ◽  
Development Project ◽  
Civil Aviation ◽  
Test Results ◽  
Technology Development Project ◽  
Fuel Nozzle ◽  
Conducting Research ◽  
Japan Aerospace Exploration Agency

The Japan Aerospace Exploration Agency (JAXA) is conducting research and development on aircraft engine technologies to reduce environmental impact for the Technology Development Project for Clean Engines (TechCLEAN). As a part of the project, combustion technologies have been developed with an aggressive target that is an 80% reduction over the NOx threshold of the International Civil Aviation Organization (ICAO) Committee on Aviation Environmental Protection (CAEP)/4 standard. A staged fuel nozzle with a pilot mixer and a main mixer was developed and tested using a single-sector combustor under the target engine's landing and takeoff (LTO) cycle conditions with a rated output of 40 kN and an overall pressure ratio of 25.8. The test results showed a 77% reduction over the CAEP/4 NOx standard. However, the reduction in smoke at thrust conditions higher than the 30% MTO condition and of CO emission at thrust conditions lower than the 85% MTO condition are necessary. In the present study, an additional fuel burner was designed and tested with the staged fuel nozzle in a single-sector combustor to control emissions. The test results show that the combustor enables an 82% reduction in NOx emissions relative to the ICAO CAEP/4 standard and a drastic reduction in smoke and CO emissions.

Passenger aircraft emissions analysis at Ordu-Giresun International Airport, Turkey in 2017

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ilkay Orhan
Keyword(s):  
Aircraft Engine ◽  
Civil Aviation ◽  
Exhaust Emission ◽  
Aircraft Emissions ◽  
Emission Data ◽  
Emission Analysis ◽  
Content Type ◽  
International Airport ◽  
Engine Emission ◽  
The Impact

Purpose The purpose of this study is to present the pollutant gas produced by hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NOx) and the quantity of fuel burned from commercial aircraft at Ordu-Giresun International Airport, Turkey during the landing and take-off (LTO) cycles in 2017. Design/methodology/approach The flight data recorded by the General Directorate of State Airports Authority and the aircraft engine emission data from International Civil Aviation Organization (ICAO) Engine Exhaust Emission Databank were used for calculation. The aircraft and engine types used by the airlines for flight at Ordu-Giresun International Airport were determined. To evaluate the effect of taxi time on emission amounts, analysis and evaluations were made by taking different taxi times into consideration. Findings As a result of the emission analysis, the amount of fuel consumed by the aircraft were calculated as 6,551.52 t/y, and the emission amounts for CO, HC and NOx were estimated as 66.81, 4.20 and 79.97 t/y, respectively. Practical implications This study is aimed to reveal the effect and contribution of taxi time on the emitted emission at the airport during the LTO phase of the aircraft. Originality/value This study helps aviation authorities explain the importance of developing procedures that ensure the delivery of aircraft to flights in minimum time by raising awareness of the impact of taxi time on emitted emissions, and contributes to the determination of an aircraft emission inventory at Ordu-Giresun International Airport.

Modeling and Analysis of Anti-Icing Power of Aircraft Engine Inlet Based on Symmetric Algorithms

2021 ◽  
Vol 7 (6) ◽  
pp. 6361-6374
Author(s):  
Hui Peng
Keyword(s):  
Flow Field ◽  
Evaluation Method ◽  
Learning Strategy ◽  
Aircraft Engine ◽  
Absolute Error ◽  
Civil Aviation ◽  
Particle Swarm Algorithm ◽  
Intake Port ◽  
Experimental Conditions ◽  
Modeling And Analysis

To evaluate the capability of engine inlet, inlet components and power plant anti ICER under low temperature, this paper introduces the evaluation method of anti icing system for civil aviation engine room, and analyzes the anti icing power of the aircraft intake based on the symmetric algorithm. The realizable k-cube model and wall function method are used to analyze the flow field in the inlet of an aircraft engine. Based on the analysis of the flow field of the intake port of an aircraft engine, the anti ice power of the intake port is calculated according to the heat balance relationship of the intake port surface. The symmetrical particle swarm algorithm is adopted to optimize the calculation process of inlet anti-ice power, and the particle wide area learning strategy is used to promote the calculation of inlet anti-ice power. In this way, the computational complexity is significantly reduce and the accuracy of the power analysis of the inlet anti-ice is enhanced. The simulation results show that the absolute error of the proposed method is less than 1% in 1000 iterations. Through the analysis of the surface temperature changes of the inlet deflector under different experimental conditions, it can be known that the method can effectively analyze the anti-icing power of aircraft engine inlet.

scholarly journals New Priorities in the Environment Protection against Civil Aviation Influence

10.12737/1575 ◽  
2013 ◽  
Vol 2 (5) ◽  
pp. 25-30 ◽  
Author(s):  
Николайкин ◽  
N. Nikolaykin
Keyword(s):  
Alternative Fuels ◽  
Fuel Efficiency ◽  
Civil Aviation ◽  
Environment Protection ◽  
Ecological Requirements ◽  
Aviation Noise ◽  
Noise Impact ◽  
Efficiency Increase

The modern directions of environment protection against aircraft influence in the light of International Civil Aviation Organization (IСAO) decisions have been analyzed. Modern priorities in this activity have been revealed, tendencies of development related to international and civil aviation, as well as evolution of ecological requirements to aircraft, civil aviation’s fuel efficiency increase directions and alternative fuels, problems of aviation noise impact on habitat have been considered.

scholarly journals THEORETICAL BASES OF THE INNOVATIVE ACTIVITY OF THE CANNING ENTERPRISE RESEARCH

2017 ◽  
Vol 19 (1(63)) ◽  
pp. 139-144
Author(s):  
O.I. Laiko ◽  
V.S. Ivanchenkov ◽  
I.V. Strutynska
Keyword(s):  
Financial Services ◽  
Innovation Process ◽  
Research Process ◽  
Innovative Activity ◽  
Black Sea Region ◽  
Financial Investment ◽  
Innovation Activities ◽  
Definition Of ◽  
Canning Industry

It is considered the essence of the terms of innovations and innovative activity of the canning industry enterprise, on example of enterprises of the Ukrainian Black Sea region. It is improved the classification of types of innovations and innovative processes for canning enterprises, by allocating relevant classification groups, that are actual in the aspect of modern scientific and practical approaches. The economic essence of the category of innovative susceptibility of enterprises is determined. According to the modern requirements and challenges that arise in the process of transformation of the national economic system it is determined the need of update of the theoretical basis for the study of innovation processes, and it is proved the necessity of formulation of the objective definitions and classifications of innovations, of the types of innovation activities that make key-point in the research process of the current realities of economic development. As a result of the research of various types and definitions of innovations, it is established that the most important for the analyzing process of innovations for enterprises in the canning industry are such classifications, which are based on the degree of participation in the production process (production and non-productive innovations: administrative, in other processes of internal management, in the processes of supply-sales, in circulation processes, financial services), on the functional purpose of innovations (production and technological, personnel, economic, logistic, marketing, financial, investment, infrastructure innovations). The definition of innovations for canning enterprises is given in the article, it is developed the classification of types of innovation for the canning enterprise that is oriented on objective features and distinguishes of the innovation process, which is actually carried out by domestic enterprises that allows to take into account the aspect of actuality.

scholarly journals CERTAIN ASPECTS OF AUTOMATIZATION OF FORMING THE FORENSIC EXAMINATION CONCLUSION PROCESS

2021 ◽  
Vol 74 (1) ◽  
pp. 114-121
Author(s):  
Vasyl Kovalov ◽  
Keyword(s):  
Information System ◽  
Expert Opinion ◽  
Information Technologies ◽  
Digital Technologies ◽  
Research Process ◽  
Subject Area ◽  
Technical Errors ◽  
Forensic Examination ◽  
The Subject ◽  
Definition Of

Active introduction of digital technologies in all spheres of life is one of the main directions of state development as a whole and separate sphere of activity. The issue of using information technologies and systems during forensic examination is the subject of scientific research of many domestic and foreign scientists, but this sphere remains relevant. The introduction of digital technologies in forensic activities is one of the priority areas for the forensic science development at the present stage and has significant development potential. One of the areas of optimization and improvement of forensic activity is the development of methods to automate the formation of forensic experts and unify the description of the research process, identified features, justification and formulation of forensic conclusions, which requires legislative consolidation and regulation, analysis and definition of the subject area and development requirements and algorithms for the operation of the system interface. Unification and standardization of the content of forensic experts' opinions requires the development of common standards and an information system adopted by all subjects of forensic expertise, and meets the needs of practice. The development of an information system for forming an expert opinion and automatically forming an expert opinion will allow formalizing and unifying the description of research and results of forensic examinations, optimizing the time of forensic experts and potentially reducing the number of logical, typographical and technical errors, and simplifying quality control of forensic examinations. The proposed system will not only automate the technical work of registration of research results carried out during forensic examinations, but will also contain research algorithms, which will be stored in the form of data on already conducted research of similar objects (list and sequence of operations, identified features and their parameters).

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