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临界总推力
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  critical thrust
     It was found that the rules of the performance of ducted propellers in cavi-tation are not completely as same as that of conventional propellers. For each given cavitation number σv, there respectively exists a maximum of critical thrust coefficient in the first and second stage of cavitation.
     试验发现,导管螺旋桨的空泡性能有着与常规桨不尽相同的规律,对给定的空泡数σ_v,分别存在第一阶段空泡与第二阶段空泡的临界总推力负载系数(C_(ThT))的最大值。
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  相似匹配句对
     (M, H)-Critical Matrices
     (M,H)-临界矩阵
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     THE GAUSS -CRITICAL SUBMANIFOLDS
     高斯临界子流形
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     The total thrust force of shield machine is 342 It and torque is 450t.
     盾构总推力3421t,扭矩450t.
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     Total thrust of the shield is 3421t, torque 450t.
     盾构总推力3421t,扭矩450t.
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     Abstract A method,“gross thrust model”,is developed to determine gross thrust of jet engine and afterburning turbofan engine in flight testing.
     提出了一种飞机飞行中发动机推力测定的总推力模型。
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  critical thrust
It is argued that the anti-critical thrust of nostalgia masks the crises of monopoly capitalism and redirects the conflicts in manageable channels.
      


Cavitation-tunnel experiments investigated the performance of D-series ducted propellers in cavitating conditions were carried out in uniform flow. The experiments fitted four bladed propellers D-series (AE/A0 =0. 7,1.0) to one of the ducts BD15(t/L = 0.15) and BD12 (t/Z, = 0.12) had been finished. It was found that the rules of the performance of ducted propellers in cavi-tation are not completely as same as that of conventional propellers. For each given cavitation number σv, there respectively exists a maximum...

Cavitation-tunnel experiments investigated the performance of D-series ducted propellers in cavitating conditions were carried out in uniform flow. The experiments fitted four bladed propellers D-series (AE/A0 =0. 7,1.0) to one of the ducts BD15(t/L = 0.15) and BD12 (t/Z, = 0.12) had been finished. It was found that the rules of the performance of ducted propellers in cavi-tation are not completely as same as that of conventional propellers. For each given cavitation number σv, there respectively exists a maximum of critical thrust coefficient in the first and second stage of cavitation. The various methods for wall-effect correction were analysed and the method based on CTh identity is recommended. For calculating the characteristics by computer, the regression coefficients of the experimental results were provided. Some of the regression coefficients and the charts are given in this paper.

作者对D系列导管螺旋桨进行了均匀流场的空泡筒试验,共进行了两种盘面比的四叶D系列螺旋桨(A_E/A_O=0.7,1.0)与两种厚度比的导管BD15及BD12(t/L=0.15,0.12)相配合的试验研究。试验发现,导管螺旋桨的空泡性能有着与常规桨不尽相同的规律,对给定的空泡数σ_v,分别存在第一阶段空泡与第二阶段空泡的临界总推力负载系数(C_(ThT))的最大值。作者用各种导管螺旋桨的筒壁效应修正方法进行了计算分析,并建议可采用等C_(Th)法修正。本文例举了上述导管螺旋桨系列试验结果的部分回归系数、空泡性征曲线、权衡设计图谱及空泡限界线。

 
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