2.4 m跨声速风洞壁板参数对核心流均匀性的影响
收稿日期: 2014-09-16
修回日期: 2015-01-19
网络出版日期: 2015-01-26
Wall parameters influence on centerline flow uniformity in 2.4 m transonic wind tunnel
Received date: 2014-09-16
Revised date: 2015-01-19
Online published: 2015-01-26
刘光远 , 王瑞波 , 郭秋亭 , 魏志 , 谢疆宇 . 2.4 m跨声速风洞壁板参数对核心流均匀性的影响[J]. 航空学报, 2015 , 36(9) : 2930 -2938 . DOI: 10.7527/S1000-6893.2015.0026
Wall parameters influence on transonic flow field is complicated due to various parameters of transonic wind tunnel test section walls. One key to improve transonic equipment calibration quality and efficiency is to acquire the effect mechanism of wall parameters of wind tunnel test section on flow field uniformity. Based on 2.4 m transonic wind tunnel multi flow field calibration experiments, wall configuration parameters effect on centerline flow uniformity of large transonic wind tunnel test section is summarized and investigated by Mach number distribution standard deviation. Research results show that the centerline flow uniformity is sensitive to porosity ratio of acceleration region, which should be distributed continuously along flow direction. The overexpansion flow should be avoided in acceleration region in order to minimize the wave strength. The ejector-slot is capable of reducing blockage interference over the entire operating range.
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