scholarly journals Modeling and Simulation of a Gas Turbine Engine for Control of Mechanical Propulsion Systems

2021 ◽  
Vol 25 (4) ◽  
pp. 43-52
Author(s):  
Kyeongmi Back ◽  
Hwanil Huh ◽  
Jayoung Ki
Keyword(s):  
Modeling And Simulation ◽  
Gas Turbine ◽  
Gas Turbine Engine ◽  
Propulsion Systems ◽  
Turbine Engine

A One Dimensional, Time Dependent Inlet / Engine Numerical Simulation for Aircraft Propulsion Systems

1997 ◽  
Author(s):  
Doug Garrard ◽  
Milt Davis ◽  
Steve Wehofer ◽  
Gary Cole
Keyword(s):  
Numerical Simulation ◽  
Gas Turbine ◽  
High Frequency ◽  
Gas Turbine Engine ◽  
Simulation System ◽  
Time Dependent ◽  
Propulsion Systems ◽  
Turbine Engine ◽  
One Dimensional ◽  
Supersonic Inlet

The NASA Lewis Research Center (LeRC) and the Arnold Engineering Development Center (AEDC) have developed a closely coupled computer simulation system that provides a one dimensional, high frequency inlet / engine numerical simulation for aircraft propulsion systems. The simulation system, operating under the LeRC-developed Application Portable Parallel Library (APPL), closely coupled a supersonic inlet with a gas turbine engine. The supersonic inlet was modeled using the Large Perturbation Inlet (LAPIN) computer code, and the gas turbine engine was modeled using the Aerodynamic Turbine Engine Code (ATEC). Both LAPIN and ATEC provide a one dimensional, compressible, time dependent flow solution by solving the one dimensional Euler equations for the conservation of mass, momentum, and energy. Source terms are used to model features such as bleed flows, turbomachinery component characteristics, and inlet subsonic spillage while unstarted. High frequency events, such as compressor surge and inlet unstart, can be simulated with a high degree of fidelity. The simulation system was exercised using a supersonic inlet with sixty percent of the supersonic area contraction occurring internally, and a GE J85-13 turbojet engine.

Diagnosing Propulsion Systems of a Vessels in Varying Marine Conditions

2013 ◽  
Vol 199 ◽  
pp. 9-14
Author(s):  
Adam Charchalis
Keyword(s):  
Gas Turbine ◽  
Weather Conditions ◽  
Gas Turbine Engine ◽  
Propulsion Systems ◽  
Turbine Engine ◽  
External Conditions ◽  
The Way

The paper presents some problems of carrying out measurements of energetic characteristics and vessels performance in the conditions of sea examinations. We present the influence of external conditions in the change of vessels hull resistance and propeller characteristics as well as the influence of weather conditions in the results of examinations and characteristics of gas turbine engine. We also discuss the manner of reducing the results of measurements to the standard conditions. We present the way of preparing propulsion characteristics and the analysis of examination uncertainty for the measurement of torque.

scholarly journals NASA’s Role in Gas Turbine Technology Development: Accelerating Technical Progress via Collaboration Between Academia, Industry, and Government Agencies

2019 ◽  
Author(s):  
Kenneth L. Suder
Keyword(s):  
Gas Turbine ◽  
Technology Development ◽  
Gas Turbine Engine ◽  
Civil Aviation ◽  
Government Agencies ◽  
Reference List ◽  
Propulsion Systems ◽  
Unique Role ◽  
Turbine Engine ◽  
The Impact

Abstract Given the maturity of the gas turbine engine since its invention and also considering the limited and flattened level of resources expected to be allocated for NASA aeronautics research and development, we ask the question are NASA technology investments still needed to enable future turbine engine-based propulsion systems? If so, what is NASA’s unique role to justify NASA’s investment? To address this topic, we will first review the accomplishments and the impact that NASA Glenn Research Center has made on turbine engine technologies over the last 78 years. Specifically, this paper discusses NASA’s role and contributions to turbine engine development, specific to both 1) NASA’s role in conducting experiments to understand flow physics and provide relevant benchmark validation experiments for Computational Fluid Dynamics (CFD) code development, validation, and assessment; and 2) the impact of technologies resulting from NASA collaborations with industry, academia, and other government agencies. Note that the scope of the discussion is limited to the NASA technology contributions with which the author was intimately associated, and does not represent the entirety of the NASA contributions to turbine engine technology. The specific research, development, and demonstrations discussed herein were selected to both 1) provide a comprehensive review and reference list of the technology and its impact, and 2) identify NASA’s unique role and highlight how NASA’s involvement resulted in additional benefit to the gas turbine engine community. Secondly, we will discuss current NASA collaborations that are in progress and provide a status of the results. Finally, we discuss the challenges anticipated for future turbine engine-based propulsion systems for civil aviation and identify potential opportunities for collaboration where NASA involvement would be beneficial. Ultimately, the gas turbine engine community will decide if NASA involvement is needed to contribute to the development of the design and analysis tools, databases, and technology demonstration programs to meet these challenges for future turbine engine-based propulsion systems.

scholarly journals NASA's Role in Gas Turbine Technology Development: Accelerating Technical Progress Via Collaboration Between Academia, Industry, and Government Agencies

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Kenneth L. Suder
Keyword(s):  
Gas Turbine ◽  
Technology Development ◽  
Gas Turbine Engine ◽  
Civil Aviation ◽  
Government Agencies ◽  
Reference List ◽  
Propulsion Systems ◽  
Unique Role ◽  
Turbine Engine ◽  
The Impact

Abstract Given the maturity of the gas turbine engine since its invention and considering the limited resources expected to be allocated for NASA aeronautics research and development, we ask the question are NASA technology investments still needed to enable future turbine engine-based propulsion systems? If so, what is NASA's unique role to justify NASA's investment? To address this topic, we first summarize NASA's role and contributions to turbine engine development, specific to both (1) NASA's role in conducting experiments to understand flow physics and provide relevant benchmark validation experiments for computational fluid dynamics (CFD) code development, validation, and assessment and (2) the impact of technologies resulting from NASA collaborations with industry, academia, and other government agencies. Note that the scope of the discussion is limited to the NASA technology contributions with which the author was intimately associated and does not represent the entirety of the NASA contributions to turbine engine technology. The specific research, development, and demonstrations discussed herein were selected to both (1) provide a comprehensive review and reference list of the technology and its impact and (2) identify NASA's unique role and highlight how NASA's involvement resulted in additional benefit to the gas turbine engine community. Second, we will discuss current NASA collaborations that are in progress and provide a status of the results. Finally, we discuss the challenges anticipated for future turbine engine-based propulsion systems for civil aviation and identify potential opportunities for collaboration where NASA involvement would be beneficial.

scholarly journals Evaluation of marine gas turbine engine parameters in terms of exhaust harmful emissions

2017 ◽  
Vol 171 (4) ◽  
pp. 87-91
Author(s):  
Paweł WIRKOWSKI ◽  
Tomasz KNIAZIEWICZ
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Exhaust Emissions ◽  
Gas Turbine Engine ◽  
Environmental Aspects ◽  
Propulsion Systems ◽  
Turbine Engine ◽  
Preliminary Results ◽  
Harmful Emissions

The article presents an analysis of the use of gas turbine engine in the propulsion and marine power plant of vessels, taking into account environmental aspects. The preliminary results of emission tests of harmful exhaust emissions of the laboratory gas turbine engine were presented. Also an analysis was also undertaken on the possibility of carrying out measurements of concentrations of pollutants in the marine gas turbine engine propulsion systems in terms of its operation on the vessel.

Development and Testing of a Gas Turbine Engine Combustion Air Inlet Protection Shroud for the USMC Amphibious Combat Vehicle

2018 ◽  
Author(s):  
Thomai Gastopoulos ◽  
Patricia McGinn ◽  
Joseph Lawton
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Surf Zone ◽  
Marine Corps ◽  
Gas Turbine Engine ◽  
Green Water ◽  
Scale Model ◽  
Propulsion Systems ◽  
Turbine Engine ◽  
Combat Vehicle

The Marine Corps Systems Command is evaluating alternative propulsion systems to achieve high water speed for the future USMC Amphibious Combat Vehicle (ACV). A gas turbine engine is one of the propulsion systems evaluated. The primary risk of operating a gas turbine engine in the ACV is power loss due to the ingestion of marine contaminants such as saltwater mist in the air, saltwater spray generated from the vehicle operation, green water wash caused by the operation of the vehicle in the surf zone or in rough seas, and hard particles such as sand present in the marine environment. The Auxiliary Ships and New Acquisition Support Branch (Code 425) of the Naval Surface Warfare Center, Philadelphia Division conducted a study to assist the Marine Corps Systems Command in assessing the feasibility of using a gas turbine engine as a propulsion system on future USMC ACVs. The study was focused on developing and testing a gas turbine intake solution for the ACV that can remove saltwater from the intake airstream of the notional 3,000 horsepower ACV engine. Code 425 developed a two-part solution for the intake of the ACV. The first part of the solution is the Combustion Air Protection Shroud (CAPS) located at the entrance of the engine intake and designed to protect the ACV engine from green water wash by elevating the intake above the ACV deck. The second part of the solution is a gas turbine intake filtration system located downstream of the intake shroud and designed to remove marine contaminants that enter the intake shroud. A reduced-scale model of the CAPS was designed by Code 425 in conjunction with Gibbs & Cox and tested at the Davidson Laboratory High Speed Test Basin at the Stevens Institute of Technology to determine the optimum extension height of the CAPS to protect the engine intake. This paper covers the design and testing of the CAPS. The results showed that a 2.67 ft. tall CAPS with selectively closeable air intake louvers is sufficient to keep out saltwater from the ACV gas turbine engine.

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