Modification of K-ε turbulence models for coaxial sudden-expansion swirling flows

Hau Chung Soong, Keh-Chin Chang

研究成果: Article同行評審

摘要

A successful prediction of turbulent swirling flow, which is important for simulation of gas turbine combustors and ramjet combustors, required a reliable turbulence model. The standard k-ε model which is commonly used for engineering practice is reported in less satisfactory agreement with the measured results for the flows incorporated with high streamline curvature effects. Several modified k-ε models have been studied and compared with the measurements in literature. It was found that the modified k-ε models can help improve the predictions of high-swirl-strength flows, but the improvements were not so significant. The Reynolds stress models seem to be another potential method to provide satisfactory predictions for high-swirl-strength flow fields.

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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