NDLI: Numerical Investigation of Influence of Mesh Property in Nearfield Sonic Boom Prediction

Content Provider	EDP Sciences
Author	Boping Ma Gang Wang Zhijin Lei Zhengyin Ye
Abstract	To investigate the influence of mesh property in nearfield sonic boom prediction, the over-pressures of several typical configurations are commutated and analyzed with an in-house Reynolds Average Navier-Stokes solver. The property of mesh alignment, mesh type and mesh distribution are analyzed based on the double cone configuration and the 69-degree Delta Wing Body configuration. The experimental data from wind tunnel are used as comparisons. The results show that the Mach cone aligned method has significant improvement to the accuracy for the prediction of sonic boom in nearfield. Both structured and un-structed mesh with a cylinder zone near the model can help to capture the distribution of the over-pressure, however, it is more convenient to use unstructured mesh when deal with complex configurations. The aspect ratio and circumferential spacing affect the captured shock wave peak value and the shapes. The accuracy of the prediction can be satisfied by carefully selecting these two factors. In the last, the summarized strategies for mesh generation are applied in the sonic boom prediction of a complex supersonic transport configuration, the Lockheed Martin 1021 to verify its practicability.
Ending Page	874
Starting Page	865
Page Count	10
File Format	HTM / HTML PDF
ISSN	10002758
e-ISSN	26097125
Issue Number	5
Journal	Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University
Volume Number	36
DOI	10.1051/jnwpu/20183650865
Alternate Webpage(s)	https://articles/jnwpu/abs/2018/05/jnwpu2018365p865/jnwpu2018365p865.html
Language	English
Publisher	The Northwestern Polytechnical University
Publisher Date	2018-10-01
Access Restriction	Open
Rights Holder	© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
Subject Keyword	computational fluid dynamics sonic boom nearfield prediction mesh property computational fluid dynamics / sonic boom / nearfield prediction / mesh property
Content Type	Text
Resource Type	Article
Subject	Engineering

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