Design, Fabrication and Analysis of an Electric Ducted Fan

2019 ◽  
Author(s):  
Parthasarathy Vasanthakumar ◽  
Jigme Tsering ◽  
Sumanth Siddhartha Suddunuri
Keyword(s):  
Rapid Development ◽  
Propulsion System ◽  
Basic Principles ◽  
Blade Element Theory ◽  
Ducted Fan ◽  
Ansys Cfx ◽  
Electric Aircraft ◽  
Feasible Option ◽  
Efficient Combustion ◽  
Battery Technology

Abstract Driven by rapid development in battery technology and increase in scope for electric air taxi vehicles, developing an efficient combustion free propulsion system to pair with an electric aircraft is crucial for future of aircraft industry. However, with current technology, ducted fan configuration engines are the only feasible option when it comes to combustion free propulsion system which are already being used in many unmanned drones and unmanned aerial vehicles. In the present work, simple design, analysis and fabrication of ducted fan is performed. Propeller fan and duct is designed using basic principles of blade element theory and momentum theory. Using the parameters from the theoretical design phase, 3D model is made and fabricated using 3D printing and assembled to fit with tolerances suitable for mounting motor. A test stand capable of measuring thrust by varying rpm is designed and built using Arduino based interface. Finally, the designed model is analyzed in Ansys CFX for thrust output using an MRF simulation.

Research on Parameters Matching of Ultralight Electric Aircraft Propulsion System

2013 ◽  
Vol 732-733 ◽  
pp. 1212-1215
Author(s):  
Gui Wen Kang ◽  
Yu Hu ◽  
Ya Dong Li ◽  
Wen Hui Jiang
Keyword(s):  
Electric Propulsion ◽  
High Energy ◽  
Low Noise ◽  
Electric Power System ◽  
Propulsion System ◽  
Heat Radiation ◽  
Design Parameters ◽  
Electric Propulsion System ◽  
Electric Aircraft ◽  
Parameter Matching

The propulsion system of ultralight electric aircraft is one of the general aviation technology development directions. It has the advantages such as light pollution, low noise, high energy utilization ratio, simple structure, easy maintenance, high reliability, less heat radiation, little operation cost and so on. Combined with the certain type of ultralight aircraft design parameters, the layout of aircraft electric propulsion, the principles and steps of the parameter matching of electric propulsion system were presented. The method of parameter matching and performance verification of electric propulsion system was put forward. The feasibility of the system is verified from the point of dynamic property. The study of parameter matching of electric propulsion system could not only provide basis for the integrated optimization for electric power system, but also evaluate the performance of the system simulation as reference.

scholarly journals PROFESSIONAL JUDGMENT OF AN ACCOUNTANT UNDER UNCERTAINTY

2021 ◽  
Author(s):  
Iryna Melnychuk ◽  
◽  
Oksana Lopatovska ◽  
Keyword(s):  
Business Processes ◽  
Rapid Development ◽  
International Standards ◽  
Professional Judgment ◽  
Accounting System ◽  
Basic Principles ◽  
Domestic Legislation ◽  
Variable Characteristic ◽  
Specific Alternative ◽  
The Cost

The modern accountant works in extremely difficult conditions, which is associated with the rapid development of the service economy, which leads to the formation of new and complex business processes and operations. Since all transactions must be reflected in the accounting system of the enterprise, there is a need to find sound methods that allow to implement it within the existing legal field. However, domestic legislation in the field of accounting and taxation is increasingly undergoing changes that are not always relevant and systematic. As a result, the accountant in his work is faced with problematic issues that need to be addressed immediately. However, the solution of such problems is not always directly regulated by law. In such conditions, the role and importance of professional judgment of the accountant, the content of which is disclosed in the article, increases significantly. It is determined that professional judgment is bases on acquired knowledge, own skills, abilities, experience and professional sense, and is a kind of superstructure of professional opportunities. The cost of such a judgment depends on the result obtained on the basis of its application. Professional judgment is a variable characteristic of an accountant's capabilities and requires constant development. To do this, you should follow certain principles, which include consistency, argumentation, reliability, completeness, logic. Adherence to these principles will form the level of professional judgment that will provide an opportunity to effectively solve non-standard production situations and bring additional income to the accountant. In addition, we believe that the application of international accounting and reporting standards provides more opportunities for the development of accounting judgment. This is because international standards describe the basic principles that a particular entity must comply with. Domestic accounting regulations provide many alternatives by which objects can be recognized in accounting. Therefore, the development of professional judgment in the application of national provisions is primarily related to the justification of a specific alternative or scheme of application of methods of recognition, evaluation, accounting of individual objects.

scholarly journals A Review of Concepts, Benefits, and Challenges for Future Electrical Propulsion-Based Aircraft

Aerospace ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 44 ◽  
Author(s):  
Smruti Sahoo ◽  
Xin Zhao ◽  
Konstantinos Kyprianidis
Keyword(s):  
Technological Development ◽  
Propulsion System ◽  
New Paradigm ◽  
Modeling Framework ◽  
Future Technology ◽  
Electric Aircraft ◽  
Electrical Propulsion ◽  
Development Paths ◽  
System Configurations ◽  
Insight Into

Electrification of the propulsion system has opened the door to a new paradigm of propulsion system configurations and novel aircraft designs, which was never envisioned before. Despite lofty promises, the concept must overcome the design and sizing challenges to make it realizable. A suitable modeling framework is desired in order to explore the design space at the conceptual level. A greater investment in enabling technologies, and infrastructural developments, is expected to facilitate its successful application in the market. In this review paper, several scholarly articles were surveyed to get an insight into the current landscape of research endeavors and the formulated derivations related to electric aircraft developments. The barriers and the needed future technological development paths are discussed. The paper also includes detailed assessments of the implications and other needs pertaining to future technology, regulation, certification, and infrastructure developments, in order to make the next generation electric aircraft operation commercially worthy.

scholarly journals On the mathematical foundations of theoretical statistics

1922 ◽  
Vol 222 (594-604) ◽  
pp. 309-368 ◽  
Keyword(s):  
Fundamental Problem ◽  
Rapid Development ◽  
Basic Principles ◽  
Practical Applications ◽  
General Proof ◽  
Statistical Science ◽  
Mathematical Foundations ◽  
Anomalous State

Several reasons have contributed to the prolonged neglect into which the study of statistics, in its theoretical aspects, has fallen. In spite of the immense amount of fruitful labour which has been expended in its practical applications, the basic principles of this organ of science are still in a state of obscurity, and it cannot be denied that, during the recent rapid development of practical methods, fundamental problems have been ignored and fundamental paradoxes left unresolved. This anomalous state of statistical science is strikingly exemplified by a recent paper entitled "The Fundamental Problem of Practical Statistics," in which one of the most eminent of modern statisticians presents what purports to be a general proof of BAYES' postulate, a proof which, in the opinion of a second statistician of equal eminence, "seems to rest upon a very peculiar -- not to say hardly supposable -- relation."

scholarly journals A review of electromechanical actuators for More/All Electric aircraft systems

2017 ◽  
Vol 232 (22) ◽  
pp. 4128-4151 ◽  
Author(s):  
Guan Qiao ◽  
Geng Liu ◽  
Zhenghong Shi ◽  
Yawen Wang ◽  
Shangjun Ma ◽  
...  
Keyword(s):  
Rapid Development ◽  
Performance Testing ◽  
Future Research ◽  
Mechanical Transmission ◽  
Direct Drive ◽  
Electromechanical Actuators ◽  
Electromechanical Actuator ◽  
Aircraft Systems ◽  
Electric Aircraft ◽  
Low Efficiency

Conventional hydraulic actuators in aircraft systems are high maintenance and more vulnerable to high temperatures and pressures. This usually leads to high operating costs and low efficiency. With the rapid development of More/All Electric technology, power-by-wire actuators are being broadly employed to improve the maintainability, reliability, and manoeuvrability of future aircraft. This paper reviews the published application and development of the airborne linear electromechanical actuator. First, the general configuration, merits, and limitations of the gear-drive electromechanical actuator and the direct-drive electromechanical actuator are analysed. Second, the development state of the electromechanical actuator testing systems is elaborated in three aspects, namely the performance testing based on room temperature, testing in a thermal vacuum environment, and iron bird. Common problems and tendencies of the testing systems are summarized. Key technologies and research challenges are revealed in terms of fault-tolerant motor, high-thrust mechanical transmission, multidisciplinary modelling, thermal management, and thermal analysis. Finally, the trend for future electromechanical actuators in More/All Electric Aircraft applications is summarized, and future research on the airborne linear electromechanical actuators is discussed.

scholarly journals Design of a Cogeneration Hybrid Propulsion System for Commuter Aircrafts With Thermal Recovery

2015 ◽  
Author(s):  
Michele Trancossi
Keyword(s):  
Heat Recovery ◽  
Ghg Emissions ◽  
System Optimization ◽  
Thermal Recovery ◽  
Propulsion System ◽  
Hybrid Propulsion ◽  
Ducted Fan ◽  
Constructal Law ◽  
Cogeneration System ◽  
Effective Design

This paper approaches the argument of cogeneration in aircraft propulsion. It presents an effective design of a cogeneration system with thrust augmentation by heat recovery for aeronautic propulsion which can be installed inside an electrical ducted fan unit. The system optimization is based on constructal law. Energy comparison against potential competitors is produced together with an analysis in terms of GHG emissions.

Research on the Rotor of a Ducted Fan Propulsion System of MOSUPS Aircraft Taking into Account Self-Balance during Operation

2015 ◽  
Vol 240 ◽  
pp. 191-197
Author(s):  
Dominik Głowacki ◽  
Krzysztof Bogdański ◽  
Miroslaw Rodzewicz
Keyword(s):  
Complex Geometry ◽  
Dynamic Properties ◽  
Propulsion System ◽  
Term Operation ◽  
Ducted Fan ◽  
Modeling Analysis ◽  
Statically Unbalanced Rotor ◽  
Aerial Vehicle ◽  
Joined Wing

The work concerns the research of a propulsion system for an unmanned aerial vehicle MOSUPS in joined wing configuration. Modeling, analysis and experimental research of a statically unbalanced rotor of a ducted fan propulsion system has been conducted.The aim of the analysis was to determine the critical rotational speeds of the rotor due to the probable excitation of oscillations. Due to the complex geometry, Finite Element Method has been used for the calculations. In the study, the critical frequencies (and also rotational speeds) of the rotor as well as precessional instability, flexibly mounted in the bearings have been calculated. Campbell and SAFE diagrams have been presented.Furthermore, the paper presents the idea for a device for automatic dynamic balancing of the mentioned rotor. A mechanism for changing the position of the correction weights has been developed, allowing for a long term operation of rotating parts without the need to stop the unit and correcting the unbalance.The main motivation for work was to fully understand the working conditions of the propulsion system and dynamic properties of the rotor in order to carry out a proper assessment of their impact on the safe operation of the aircraft.

A method to improve the efficiency of an electric aircraft propulsion system

Energy ◽  
2017 ◽  
Vol 140 ◽  
pp. 436-443 ◽  
Author(s):  
Shaohua Ma ◽  
Shuli Wang ◽  
Chengning Zhang ◽  
Shuo Zhang
Keyword(s):  
Propulsion System ◽  
Electric Aircraft ◽  
Aircraft Propulsion System ◽  
Aircraft Propulsion
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