The study of asymmetric distribution of cross-corre function of turbulence modulation

Wei Fu Lu, Wei-Hsiang Lai, Keh-Chin Chang, Tung Hsiao Tsai

研究成果: Article同行評審

摘要

As reported in the study of Chang et al. (2003), the modulation of the carrier-phase turbulence, that is, the effect of the presence of dispersed phase on the turbulence structure, is heavily dependent on the term of (<ugi′upi′>-2k). Nevertheless, very few experimental data of <ugi′upi′> can be found in the literature. Wang and Huang (1995) made the <ugi′upi′> measurements by using a phase Doppler anemometer in a planar mixing-layer flow leaded with polydispersed spray. However, the accuracy of the measured <ugi′upi′> data made by Wang and Huang was in doubt according to the comparison results with the model predictions in the study of Chang et al. Tsai (2003) found that Wang and Huang overestimated the turbulence modulation quantity in the shear layer in the downstream regions, and the symmetric assumption of cross-correlation function is unavailable for large particles (30 μm). Lu et al. (2006) found that the <ugi′upi′> term and <upi′ugi′> term are also different besides asymmetric graph of cross-correlation function by using a Particle Doppler Analyzer in a turbulence field with 70 μm monodispersed droplet. This paper will discuss the reason for this.

原文English
頁(從 - 到)21-26
頁數6
期刊Hangkong Taikong ji Minhang Xuekan/Journal of Aeronautics, Astronautics and Aviation
40 B
發行號1
出版狀態Published - 2008 四月 1

All Science Journal Classification (ASJC) codes

  • 航空工程
  • 空間與行星科學

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