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半开缝
相关语句
  half slot
     The ejection from the half slot only blows away the vortex on the slot surface,and has little effect on the flow field near the trailing edge.
     半开缝时,喷气的引入仅吹除了附着在开缝处的漩涡,对于尾缘处流场影响不大。
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  相似匹配句对
     Half Beijinger
     个北京人
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     杯空?
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     小型开缝阵列的设计
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     Properties of Slotted Coaxial Line with Elliptic Cross-Section
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     开缝石英管原子化技术的改进
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  half slot
Each full slot can accommodate 388-b upper layer data while each half slot can accommodate 148-b upper layer data.
      


A two dimensional compressible computer program was developed to predict the influence of the coolant ejection on the aerodynamic performance in transonic turbine cascade.The code was applied to the computation of energy loss coefficient for two different trailing edge ejection configurations.The results show that:(1)The energy loss coefficient for the ejection thuough the trailing edge holes would be higher than that for the ejection on the pressure side near the trailing edge.(2)The trailing edge ejection...

A two dimensional compressible computer program was developed to predict the influence of the coolant ejection on the aerodynamic performance in transonic turbine cascade.The code was applied to the computation of energy loss coefficient for two different trailing edge ejection configurations.The results show that:(1)The energy loss coefficient for the ejection thuough the trailing edge holes would be higher than that for the ejection on the pressure side near the trailing edge.(2)The trailing edge ejection has no significant influence on the exit flow angle.(3)The energy loss decreases a little and then increases with increasing coolant mass ratio after a definite point.

通过尾缘喷气模型与涡轮叶栅流场计算及附面层参数的关联 ,初步提供了能较为准确预测尾缘冷气喷射对尾迹参数分布规律及气动性能影响的理论预测系统。对半开缝和对开缝两种尾缘冷气喷射的研究表明 :喷气流量比增大时 ,两种不同形式叶栅的能量损失系数都有先减小后增大的趋势 ;在相同条件下 ,半开缝叶栅的能量损失系数比对开缝在相应条件下的要稍小一些 ;尾缘喷射对于叶栅的平均出口气流角的影响很小

Numerical simulations and tests were carried out to investigate the effect of ejection from different trailing edge slots of a turbine cascade.The detailed flow field of ejection cascade was obtained by using a compact ejection model coupled with the calculation of main flow field.Numerical and experimental results show that the ejection ratio has little effect on the distribution of Mach number and exit flow angle of the two slot types.However,the energy degradation coefficient increases at first and then it...

Numerical simulations and tests were carried out to investigate the effect of ejection from different trailing edge slots of a turbine cascade.The detailed flow field of ejection cascade was obtained by using a compact ejection model coupled with the calculation of main flow field.Numerical and experimental results show that the ejection ratio has little effect on the distribution of Mach number and exit flow angle of the two slot types.However,the energy degradation coefficient increases at first and then it has a decreasing tendency with the increase of ejection ratio.The ejection from the symmetric slot blows away the vortex at the blade trailing edge and strengthens the mixing of the wake with the main flow.The ejection from the half slot only blows away the vortex on the slot surface,and has little effect on the flow field near the trailing edge.

以某涡轮叶栅为研究对象,采用试验和数值模拟相结合的方式研究了涡轮叶片尾缘不同喷气形式对叶栅性能的影响。应用一维源项喷气模型,结合涡轮叶栅流场数值模拟,得到了不同喷气形式下涡轮叶栅流场细节。计算与试验结果显示:两种开缝形式下,喷气比例对叶片表面参数以及出口气流角影响不大,但能量损失系数随着喷气比例的增大出现先增大后减小的趋势。对开缝时,喷气引入吹除了附着在叶片尾缘的漩涡,并增强了尾迹与主流的掺混过程;半开缝时,喷气的引入仅吹除了附着在开缝处的漩涡,对于尾缘处流场影响不大。

 
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