Investigation on Flow Characteristics and Parameters Optimization of a New Concept of TC Nozzle
Lighter weight, simpler structure and throat area controllable are the developing trends of aircraft engine exhaust system. To meet these challenges, a new concept of hybrid throat control (TC) nozzle was proposed to improve the control efficiency of throat area (η) by using a rotary valve with seco...
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Isfahan University of Technology
2021-01-01
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doaj-ae2b0796a7264edc9ec7dd066d4e7be22021-01-11T08:24:55ZengIsfahan University of Technology Journal of Applied Fluid Mechanics1735-35722021-01-01143819832.Investigation on Flow Characteristics and Parameters Optimization of a New Concept of TC NozzleF. Song0L. Zhou1J. W,. Shi2Z. X. Wang3Shaanxi Key Laboratory of Internal Aerodynamic in Aero-Engine, School of Engine and Energy, Northwestern Polytechnical University, Xi’an, Shaanxi, 710129, ChinaShaanxi Key Laboratory of Internal Aerodynamic in Aero-Engine, School of Engine and Energy, Northwestern Polytechnical University, Xi’an, Shaanxi, 710129, ChinaShaanxi Key Laboratory of Internal Aerodynamic in Aero-Engine, School of Engine and Energy, Northwestern Polytechnical University, Xi’an, Shaanxi, 710129, ChinaShaanxi Key Laboratory of Internal Aerodynamic in Aero-Engine, School of Engine and Energy, Northwestern Polytechnical University, Xi’an, Shaanxi, 710129, ChinaLighter weight, simpler structure and throat area controllable are the developing trends of aircraft engine exhaust system. To meet these challenges, a new concept of hybrid throat control (TC) nozzle was proposed to improve the control efficiency of throat area (η) by using a rotary valve with secondary injection. The flow mechanism of the hybrid TC nozzle and the effect of aerodynamic and geometric parameters on nozzle performance were investigated numerically. Then the approximate model characterizing the hybrid TC nozzle was established with design of experiment and response surface methodology. The approximate model was used to analysis the coupling effect between parameters and optimized the parameter combination. The results show that the flow area of the nozzle can be restricted effectively by the rotary valve and the secondary flow, and η is bigger than 5.24. Nozzle pressure ratio and secondary pressure ratio are the dominant factors for the nozzle throat area control performance. The optimization of the parameter combination was carried out with penalty function approach, with ratio of throat area control being 30 percent and corrected mass flow ratio of secondary flow being 5 percent The maximize error of the optimization result is 4.13 percent and it verifies the validity and feasibility of the approximate model.http://jafmonline.net/JournalArchive/download?file_ID=55159&issue_ID=1012throat area control; hybrid tc nozzle; flow characteristics; approximate model; performance optimization. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
F. Song L. Zhou J. W,. Shi Z. X. Wang |
spellingShingle |
F. Song L. Zhou J. W,. Shi Z. X. Wang Investigation on Flow Characteristics and Parameters Optimization of a New Concept of TC Nozzle Journal of Applied Fluid Mechanics throat area control; hybrid tc nozzle; flow characteristics; approximate model; performance optimization. |
author_facet |
F. Song L. Zhou J. W,. Shi Z. X. Wang |
author_sort |
F. Song |
title |
Investigation on Flow Characteristics and Parameters Optimization of a New Concept of TC Nozzle |
title_short |
Investigation on Flow Characteristics and Parameters Optimization of a New Concept of TC Nozzle |
title_full |
Investigation on Flow Characteristics and Parameters Optimization of a New Concept of TC Nozzle |
title_fullStr |
Investigation on Flow Characteristics and Parameters Optimization of a New Concept of TC Nozzle |
title_full_unstemmed |
Investigation on Flow Characteristics and Parameters Optimization of a New Concept of TC Nozzle |
title_sort |
investigation on flow characteristics and parameters optimization of a new concept of tc nozzle |
publisher |
Isfahan University of Technology |
series |
Journal of Applied Fluid Mechanics |
issn |
1735-3572 |
publishDate |
2021-01-01 |
description |
Lighter weight, simpler structure and throat area controllable are the developing trends of aircraft engine exhaust system. To meet these challenges, a new concept of hybrid throat control (TC) nozzle was proposed to improve the control efficiency of throat area (η) by using a rotary valve with secondary injection. The flow mechanism of the hybrid TC nozzle and the effect of aerodynamic and geometric parameters on nozzle performance were investigated numerically. Then the approximate model characterizing the hybrid TC nozzle was established with design of experiment and response surface methodology. The approximate model was used to analysis the coupling effect between parameters and optimized the parameter combination. The results show that the flow area of the nozzle can be restricted effectively by the rotary valve and the secondary flow, and η is bigger than 5.24. Nozzle pressure ratio and secondary pressure ratio are the dominant factors for the nozzle throat area control performance. The optimization of the parameter combination was carried out with penalty function approach, with ratio of throat area control being 30 percent and corrected mass flow ratio of secondary flow being 5 percent The maximize error of the optimization result is 4.13 percent and it verifies the validity and feasibility of the approximate model. |
topic |
throat area control; hybrid tc nozzle; flow characteristics; approximate model; performance optimization. |
url |
http://jafmonline.net/JournalArchive/download?file_ID=55159&issue_ID=1012 |
work_keys_str_mv |
AT fsong investigationonflowcharacteristicsandparametersoptimizationofanewconceptoftcnozzle AT lzhou investigationonflowcharacteristicsandparametersoptimizationofanewconceptoftcnozzle AT jwshi investigationonflowcharacteristicsandparametersoptimizationofanewconceptoftcnozzle AT zxwang investigationonflowcharacteristicsandparametersoptimizationofanewconceptoftcnozzle |
_version_ |
1724341354608197632 |