CAA STUDY OF ENTROPY NOISE IN NOZZLE FLOW FOR THE VALIDATION OF A 2D SEMI-ANALYTICAL MODEL

被引：0
|
作者：
Emmanuelli, Ariane [1 ]
Huet, Maxime [1 ]
Le Garrec, Thomas [1 ]
Ducruix, Sebastien [2 ,3 ]
机构：
[1] Off Natl Etud & Rech Aerosp, French Aerosp Lab, Dept Aeroacoust, F-92322 Chatillon, France
[2] Univ Paris Saclay, CNRS, Lab EM2C, F-92295 Chatenay Malabry, France
[3] Univ Paris Saclay, CentraleSupelec, F-92295 Chatenay Malabry, France
来源：
PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2017, VOL 2C | 2017年
关键词：
COMBUSTION-NOISE; TRANSMISSION; WAVES;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Analytical methods address the need to quickly determine the effect of indirect combustion noise on farfield acoustic emissions and combustion instabilities in order to account for them in new designs. A 2D axisymmetric model for indirect combustion noise through a non-compact nozzle was recently developed by Zheng et al. with this ambition [PhD Thesis, 2016]. An original Computational AeroAcoustics (CAA) approach is applied to serve as a reference case within a framework close to the model's hypotheses. Results from computations with a Euler mean flow field are compared to the model. Very good-agreement is observed, validating the approach. The data is also compared to a 1D model for the non-compact nozzle elaborated by Giauque et al. [J. Eng. Gas. Turb. Power, 134, 2012], demonstrating the importance of 2D effects and the role of radial deformation of the entropy wave.
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页数：9
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