|Table of Contents|

Numerical study on the influence of supersonic pressure probe structure on measurement accuracy(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2021年04期
Page:
37-45
Research Field:
研究与设计
Publishing date:

Info

Title:
Numerical study on the influence of supersonic pressure probe structure on measurement accuracy
Author(s):
YANG Bo1; LI Longfei2; WU jianhong3; MA Hu1*; ZHOU Shengbing4
(1.School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China 2.Xian Aerospace Propulsion Institute,Xian 710100,China 3.Beijing Great Wall Institute of Metrology and testing technology,AVIC,Beijing 100095,China 4.College of Aerospace Engineering,Chongqing University,Chongqing 400044,China)
Keywords:
numerical simulation total pressure probe static pressure probe supersonic
PACS:
O354.3
DOI:
-
Abstract:
The objective is to explore the influence of the opening form of the total pressure probe and static pressure probe in the supersonic flow on its measurement accuracy,and to obtain the high-precision total pressure probe and static pressure probe structure parameters.In this paper,FLUENT commercial software is used to study the performance of the total pressure probe with three opening forms:inner chamfer,hemispherical head,and outer chamfer under the conditions of seven incoming flow Mach numbers and three incoming flow deflection angles.In addition,the performance of three open-shaped static pressure probes under seven flow Mach number conditions is studied.The research results show that the numerical simulation results are in good agreement with the wind tunnel experimental results,which verifies the reliability of the numerical method.The comparison between the numerical simulation results and the theoretical value shows that the disturbance degree of the flow field by the total pressure probe is positively correlated with the accuracy of the total pressure probe.The total pressure probe with external chamfer has the best insensitivity to the installation deflection,and the relative error is less than 1.5%.The chamfer size of the total pressure probe with external chamfer has almost no effect on itsperformance.Under the conditions given in this article,the static pressure probe with a 0.2D measuring hole and a 15°angle of inclined hole can get higher-precision results.

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