首页> 外文会议>International Conference on Fluid Mechanics; 20040720-30; Dalian(CN) >SIMULTANEOUS MEASUREMENTS OF ENERGY AND TEMPERATURE DISSIPATION RATES IN THE FAR FIELD OF A CYLINDER WAKE
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SIMULTANEOUS MEASUREMENTS OF ENERGY AND TEMPERATURE DISSIPATION RATES IN THE FAR FIELD OF A CYLINDER WAKE

机译:汽缸远场中能量和温度耗散率的同时测量

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摘要

Simultaneous approximations to energy and temperature dissipation rates, denoted as ε_(ap) and χ_(ap), are obtained using a probe consisting of four hot wires and a pair of parallel cold wires. The probe also enables the measurement of the span wise (ω_3) or after a 90° rotation, the transverse component (ω_2) of the vorticity vector. The performance of the probe in measuring velocity and temperature derivatives and vorticity has been checked satisfactorily by comparing with isotropic calculations. The correlations between the two dissipation fields and the enstrophy are examined. The correlations between vorticity and temperature fluctuations are also analyzed.
机译:使用由四根热线和一对平行的冷线组成的探头,可以同时获得能量和温度耗散率的近似值,分别表示为ε_(ap)和χ_(ap)。该探头还可以测量跨度方向(ω_3)或在旋转90°后测量涡度矢量的横向分量(ω_2)。通过与各向同性计算进行比较,已经令人满意地检查了探头在测量速度和温度导数以及涡度方面的性能。检查了两个耗散场与涡旋之间的相关性。还分析了涡度和温度波动之间的相关性。

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