High Fidelity System Simulation of Aerospace Vehicles Using NPSS

Sampath, Rajiv; Plybon, Ronald C.; Meyers, C.; Irani, Rohinton K.; Balasubramaniam, Mahadevan

doi:10.2514/6.2004-371

Cited by 8 publications

(3 citation statements)

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“…Lastly the secondary flows circuit provides cooling for various components on the engine hot section. 23 The propulsion system is a highly complex and integrated environment. Yet to model the propulsion system, most of the interactions can be simplified as power extraction, engine bleed, and thrust requirements at a given mission condition.…”

Section: Propulsionmentioning

confidence: 99%

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Hybrid Environmental Control System Integrated Modeling Trade Study Analysis for Commercial Aviation

Parrilla¹

2014

SAE Technical Paper Series

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Current industry trends demonstrate aircraft electrification will be part of future platforms in order to achieve higher levels of efficiency in various vehicle level subsystems. However electrification requires a substantial change in aircraft design that is not suitable for re-winged or re-engined applications as some aircraft manufacturers are opting for today. Thermal limits arise as engine cores progressively get smaller and hotter to improve overall engine efficiency [8] , while legacy systems still demand a substantial amount of pneumatic, hydraulic and electric power extraction. The environmental control system (ECS) provides pressurization, ventilation and air conditioning in commercial aircraft [7] , making it the main heat sink for all aircraft loads with exception of the engine. To mitigate the architecture thermal limits in an efficient manner, the form in which the ECS interacts with the engine will have to be enhanced as to reduce the overall energy consumed and achieve an energy optimized solution.This study examines a tradeoff analysis of an electric ECS by use of a fully integrated Numerical Propulsion Simulation System (NPSS) model that is capable of studying the interaction between the ECS and the engine cycle deck. It was found that a peak solution lays in a hybrid ECS where it utilizes the correct balance between a traditional pneumatic and a fully electric system. This intermediate architecture offers a substantial improvement in aircraft fuel consumptions due to a reduced amount of waste heat and customer bleed in exchange for partial electrification of the air-conditions pack which is a viable option for re-winged applications. iii iv Para Dayana, Isaac y Ofelia v vi Acknowledgements I would first like to thank my wife, Dayana, for all her encouragement, support and patience, without her this paper would have not been possible. Her love was ever present, driving me to successfully completing my dissertation, at much sacrifice, because failure was not an option. Gracias! Furthermore, this dissertation could not have been completed without the help of numerous people. I would like to thank my advisor, Dr. Awatef Hamed, for having trusted in my capabilities and facilitated the opportunity for me to join the Vehicle Energy Systems and Integrations group at GE Aviation, which made this work possible.

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Section: Propulsionmentioning

confidence: 99%

“…For example, engine manufactures have been modeling in NPSS since 1996, building the first full native model in June of 2001 [23] . Today all engine cycle decks are developed exclusively in NPSS, using common components that are tailored to the specific needs of each application.…”

Section: Figure 41: Npss Integration Frameworkmentioning

confidence: 99%

Hybrid Environmental Control System Integrated Modeling Trade Study Analysis for Commercial Aviation

Parrilla¹

2014

SAE Technical Paper Series

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“…In the late 1990s, National Aeronautics and Space Administration (NASA), united airlines industries, universities, and government institutions proposed the Numerical Propulsion System Simulation (NPSS) platform. This platform, using the simulation algorithm and the discipline coupling technology which can freely zoom and change dimensions, deeply reveals the complex flow inside the combustion engine and the mutual relations among the components and realizes the detailed simulation of the whole machine [3,4]. Simulation flow chart of high precision component modeling based on NPSS framework is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

The Off‐Design Performance Simulation of Marine Gas Turbine Based on Optimum Scheduling of Variable Stator Vanes

Wang

Fan

et al. 2017

Mathematical Problems in Engineering

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As one of the antisurge techniques, the adjusting scheme of VSV under off-design conditions has a significant impact on the performance of gas turbines. In this paper, the one-dimensional characteristic of the compressor calculation program is embedded into the zero-dimensional overall gas turbine model, which replaces the original compressor characteristic module. Based on the assembling relationship of the actual components of the marine gas turbine, the architecture of the modular model library is designed, and an integrated simulation platform of marine gas turbine is developed by using MATLAB/GUI software. The influence of the first 3 rows of variable stator vanes of the 9-stage axial compressor working alone on the performance of the compressor at different speeds and different angles was analyzed by the HARIKA compressor characteristic calculation program. Taking the economics and stability of the gas turbine as the optimization objective, the optimization of the first three-stage stator vanes regulation schemes under different working conditions was carried out. The steady-state performance parameters under each working condition of gas turbine of power generation with or without variable stator vane mode were calculated. The study results can provide references for the adjusting scheme of VSV under gas turbine off-design conditions operating process.

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Gas Turbine Engines: Fundamentals

Greatrix

2012

Powered Flight

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High Fidelity System Simulation of Aerospace Vehicles Using NPSS

Cited by 8 publications

References 0 publications

Hybrid Environmental Control System Integrated Modeling Trade Study Analysis for Commercial Aviation

Hybrid Environmental Control System Integrated Modeling Trade Study Analysis for Commercial Aviation

The Off‐Design Performance Simulation of Marine Gas Turbine Based on Optimum Scheduling of Variable Stator Vanes

Gas Turbine Engines: Fundamentals

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