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首页> 外文期刊>The Aeronautical Journal >Experimental investigation of the effect of nozzle shape and test section perforation on the stationary and non-stationary characteristics of flow field in the large transonic TsAGI T-128 Wind tunnel
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Experimental investigation of the effect of nozzle shape and test section perforation on the stationary and non-stationary characteristics of flow field in the large transonic TsAGI T-128 Wind tunnel

机译：大跨音速TsAGI T-128风洞中喷嘴形状和测试截面穿孔对流场固定和非平稳特性影响的实验研究

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摘要

The results are presented for a cycle of experimental investigations of flow field characteristics (static pressure distribution, static pressure fluctuations, upwash, boundary-layer parameters) in the perforated test section of the transonic TsAGI T-128 Wind Tunnel. The investigations concern the effect of nozzle shape, wall open-area ratio, Mach and Reynolds numbers on the above-outlined flow characteristics. During the tests, the main Wind-tunnel drive power is measured. Optimal parameters of the nozzle shape and test section perforation are obtained to minimise acoustic perturbations in the test section and their non-uniformity in frequency, static pressure field non-uniformity, nozzle and test section drag and, accordingly, required main Wind-tunnel drive power.
机译：给出的结果是对跨音速TsAGI T-128风洞测试区域中流场特性（静压分布，静压波动，上冲，边界层参数）进行实验研究的一个周期。研究涉及喷嘴形状，壁开口率，马赫数和雷诺数对上述流动特性的影响。在测试过程中，将测量主风洞驱动功率。获得了喷嘴形状和测试部分穿孔的最佳参数，以最大程度地减少测试部分中的声学扰动以及它们在频率上的不均匀性，静压力场的不均匀性，喷嘴和测试部分的阻力以及相应的主风洞驱动功率。

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