Evaluation of a new wind tunnel with expanding corners
Evaluation of a new wind tunnel with expanding corners
复制标题
具有扩展角的新型风洞的评估
DOI：
10.1007/s00348-003-0705-y
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发表时间：
2004
影响因子：
2.4
通讯作者：
A. Johansson
中科院分区：
文献类型：
--
作者：
B. Lindgren;A. Johansson
KTH设计并建造了一个新的低速、闭路、封闭试验段风洞，称为BLT。试验段内的湍流强度<0.04%，总压变化<±0.1%，横截面上的温度变化<±0.07°C。Lindgren等人于1998年首次研究了扩张比为1.32的扩张角的概念，该概念已成功实施，在弦雷诺数为200，000时，二维总压损失系数为0.047。它与大多数使用非扩张角的风洞中的数值相当，甚至更好。这项研究的结果证明了扩大拐角的有用性，以实现紧凑的风洞电路设计，而不影响流动质量。
A new low-speed, closed-circuit, closed-test-section wind tunnel, called BLT, has been designed and built at KTH. The turbulence intensity in the test section is <0.04%, the total pressure variation is <±0.1% and the temperature variation is <±0.07°C over the cross-sectional area. The concept of expanding corners with an expansion ratio of 1.32 first investigated by Lindgren et al. in 1998, has been implemented successfully with a two-dimensional total pressure loss coefficient of 0.047 at a chord Reynolds number of 200,000. It is comparable to or even better than the values found in most wind tunnels using nonexpanding corners. The findings in this study prove the usefulness of expanding corners to achieve a compact wind tunnel circuit design without compromising the flow quality.