不同攻角对涡轮叶栅损失的影响

孙大伟; 乔渭阳; 许开富; 李伟

不同攻角对涡轮叶栅损失的影响

西北工业大学动力与能源学院, 西安 710072

基金项目: 国家自然科学基金(10377011)

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出版历程
- 收稿日期: 2007-07-02
- 修回日期: 2007-12-20
- 刊出日期: 2008-07-28

Influence of different incidences on loss in turbine cascade

School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China

摘要

摘要: 应用基于压力修正的三维计算流体动力学(CFD)程序,通过改变进口攻角,对不同工况下的涡轮叶栅流场进行了数值模拟.并结合CFD模拟结果,应用较合理的损失分离方法,对比分析了三种常用的变工况涡轮损失预测模型.结果表明:在正攻角情况下,随着攻角的增加,涡轮叶栅总压损失显著增加;在负攻角情况下,随着攻角的增加,涡轮叶栅总压损失则有种先减小后增大的趋势,但变化范围不大.而对于三种变工况涡轮损失预测模型来说,虽能基本上反映出涡轮损失随攻角的变化趋势,但预测结果差别很大.
- 攻角 /
- 损失预测模型 /
- 总压损失
Abstract: A pressure-correction 3-Dcomputational fluid dynamics(CFD) code was used to simulate numerically the flow fluid of turbine cascade with different incidences.And three turbine loss models of off-design operating condition were analyzed and compared on the basis of the CFDnumerical simulation.The results show that the total pressure loss increases with the increase of incidence,provided that the incidence is positive;the total pressure loss decreases a little and then increases with the increase of incidence,provided that the incidence is negative.Though three turbine loss models of off-design operating condition can show the changing tendency of the total pressure loss with the change of incidence,the prediction results differ a lot.
- incidence /
- turbine loss models /
- total pressure loss

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参考文献(12)

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