| 自由流紊流度对串列叶栅性能的影响 |
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| 引用本文： | 周正贵,吴国钏.自由流紊流度对串列叶栅性能的影响[J].航空动力学报,1996,11(1):1-3. |
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| 作者姓名： | 周正贵 吴国钏 |
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| 作者单位： | 南京航空航天大学 |
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| 摘 要： | 通过实验，测量了自由流紊流度（Ｔｕ）在１．４％－６．７％范围内，一双圆弧串列叶栅总压损失系数、气流转角、附面层内速度分布以及吸力面压力系数。结果表明：（１）当Ｔｕ小于大约３％时，随着Ｔｕ增加，总压损失明显降低；当Ｔｕ大于３％时，Ｔｕ变化对总压损失几乎无影响。（２）Ｔｕ在１．４％－６．７％范围内变化对气流转角无影响。（３）Ｔｕ增加，对前排叶片吸力面靠近前缘部分附面层有有利影响。
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| 关 键 词： | 串列叶栅 紊流流动 总压损失系数 流动特性 |
| 收稿时间： | 1/1/1995 12:00:00 AM |
| 修稿时间： | 4/1/1995 12:00:00 AM |
EFFECTS OF FREESTREAM TURBULENCE ON CASCADE PERFORMANCE |
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| Zhou Zhenggui and Wu Guochuan.EFFECTS OF FREESTREAM TURBULENCE ON CASCADE PERFORMANCE[J].Journal of Aerospace Power,1996,11(1):1-3. |
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| Authors: | Zhou Zhenggui and Wu Guochuan |
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| Abstract: | Effects of freestream turbulence on the losses,fluid turning angles,pressure coefficients and boundary layer velocity profiles of a double circular arc tandem cascade were investigated experimentally.At turbulence level (denoted here by Tu) smaller than about 3%,the total pressure loss coefficient decreases significantly with increasing Tu;at Tu>3%,the effect of Tu on the total pressure coefficient is negligible.In the whole range of 1 5%
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| Keywords: | Cascades Turbulence flow Total pressure recovery coefficient Flow characteristics |
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