Injection-induced turbulence in stagnation-point boundary layers
Injection-induced turbulence in stagnation-point boundary layers
复制标题
驻点边界层中注入引起的湍流
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
C. Park
中科院分区：
文献类型：
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作者：
C. Park
在假定湍流是由喷射在壁面产生的条件下，建立了有喷射的驻点边界层理论。从风洞现有的实验传热率数据中，推导出壁面混合长度是一个时间常数和喷射速度的乘积。该理论重现了在高喷射率下观察到的传热率的增加。对于石墨和碳 - 碳复合材料，根据在电弧风洞和弹道试验场获得的现有烧蚀数据，确定时间常数为0.0002秒。
A theory is developed for the stagnation point boundary layer with injection under the hypothesis that turbulence is produced at the wall by injection. From the existing experimental heat transfer rate data obtained in wind tunnels, the wall mixing length is deduced to be a product of a time constant and an injection velocity. The theory reproduces the observed increase in heat transfer rates at high injection rates. For graphite and carbon-carbon composite, the time constant is determined to be 0.0002 sec from the existing ablation data taken in an arc-jet tunnel and a balistic range.