| 非定常环境中叶栅总压恢复系数的数值研究 |
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| 引用本文： | 闫朝,季路成,于海力,徐建中.非定常环境中叶栅总压恢复系数的数值研究[J].航空动力学报,2004,19(1):113-117. |
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| 作者姓名： | 闫朝 季路成 于海力 徐建中 |
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| 作者单位： | 中国科学院,工程热物理研究所,北京,100080 |
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| 基金项目： | 国家自然科学基金资助项目(59906012)，国家重点基础研究发展规划项目资助(G1999022305)，中国科学院知识创新工程资助项目(KGCX2-301) |
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| 摘 要： | 利用以Ni格式和隐式双时间步法求解二维非定常N-S方程为基础的数值模拟方法研究了流动的非定常性对涡轮叶栅总压恢复系数的影响,并与文中提出的定常模型和准定常模型进行了对比。结果发现,非定常流动能够提高叶栅的总压恢复系数,但这是建立在与准定常流相比较的层面上,而和定常流比较时,非定常流只会使总压恢复系数下降。
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| 关 键 词： | 航空、航天推进系统 非定常流 数值模拟 定常模型 准定常模型 涡轮叶栅 |
| 文章编号： | 1000-8055(2004)01-0113-05 |
| 收稿时间： | 2003/3/24 0:00:00 |
| 修稿时间： | 2003年3月24日 |
Numerical Investigation of Total-Pressure Recovery Coefficient of Cascade in Unsteady Environment |
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| YAN Zhao,JI Lu-cheng,YU Hai-li and XU Jian-zhong.Numerical Investigation of Total-Pressure Recovery Coefficient of Cascade in Unsteady Environment[J].Journal of Aerospace Power,2004,19(1):113-117. |
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| Authors: | YAN Zhao JI Lu-cheng YU Hai-li and XU Jian-zhong |
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| Institution: | Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing100083, China;Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing100083, China;Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing100083, China;Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing100083, China |
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| Abstract: | A numerical method based on Ni and implicit dual-time steps scheme for solving the 2-D unsteady N-S equations is applied to investigating the influence of unsteadiness on the total-pressure recovery coefficient of turbine cascade,results of which are compared with that of the steady model and quasi-steady model introduced in this paper.Calculated results show that the unsteadiness of flow can increase the total-pressure recovery coefficient of cascade,when compared with quasi-steady flow.The unsteady flow tends to decrease the total-pressure recovery coefficient when compared with steady flow. |
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| Keywords: | aerospace propulsion system unsteady flow numerical simulation steady model quasi-steady model turbine cascade |
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