| 高超声速风洞扩压器试验研究与分析 |
| |
| 引用本文： | 童华,孙启志,张绍武. 高超声速风洞扩压器试验研究与分析[J]. 实验流体力学, 2014, 0(3): 78. DOI: 10.11729/syltlx20120201 |
| |
| 作者姓名： | 童华 孙启志 张绍武 |
| |
| 作者单位： | 中国空气动力研究与发展中心超高速所,四川 绵阳,621000 |
| |
| 摘 要： | 扩压器是高超声速风洞的关键部件,主要作用是提高出口气流的静压。在某高超声速风洞扩压器上布点测量壁面静压和近壁面皮托压力,并在出口布置尖劈测量出口气流参数,评估扩压器的性能。结果表明:扩压器内的核心流区由于存在逐步衰减的激波-膨胀波系,使气流出现“减速-加速-再减速-再加速”的流动过程;该扩压器能保证风洞正常启动以及试验段流场不受背压的影响;该扩压器的效率与国外类似风洞扩压器效率相当,前室总压较低时,扩压器能起到良好的减速增压的效果,前室总压较高时,扩压器增压效果不明显,扩压器出口气流马赫数偏高。
|
| 关 键 词： | 高超声速风洞 扩压器 压力 马赫数 |
Investigation and analyse on the diffuser of hypersonic wind tunnel |
| |
| Abstract: | Diffuser is the critical part of the hypersonic wind tunnel,The mainly role of the diffuser is to increase the static pressure at the diffuser exit.The wall static pressures and near-wall total pressure pressures along the diffuser are measured,and a measurement rake is installed to measure the flow parameters at the exit of diffuser and evaluate the internal flow performance of the diffuser.The results indicate that the phenomenon of“speed slow-up-slow-up”in inflow of the diffuser appears,the existing diffuser can ensure normal start of the wind tunnel and isolate the test section from disturbance of back pressure;the efficiency of the diffuser is correspond to the similar ones of foreign countries.If the stilling chamber pressure is lower,the diffuser has better effect of reducing speed and boosting pressure;conversely,the effect is not well,the Mach number at the exit is higher. |
| |
| Keywords: | |
|
| 点击此处可从《实验流体力学》浏览原始摘要信息 |
|
点击此处可从《实验流体力学》下载免费的PDF全文 |
|
