Distribution and calculation of surface velocity field in ship wakes of sar image 合成孔径雷达图像中舰船航迹表面速度场的分布与计算
We also proposed a reformed surface speed method based on the problems of surface speed method in engineering application . this method can make sure the structure radiant sound status in total noise and the detail phonate part quickly and correctly 根据表面速度法在工程应用中存在的问题提出了频带声压级差值法,该方法能快速准确地确定结构声在总噪声中的地位和结构的具体发声部位。
To investigate the aerodynamic design ideas and concrete methods of high performance low pressure turbine ( lpt ) at low reynolds number condition , a new lpt of high load , large chord and proper velocity distribution was designed 摘要为了探索高空低雷诺数情况下高性能低压涡轮部件的气动设计思路和设计方法,通过采用高负荷、大弦长的叶片设计和选择恰当的叶片表面速度分布形式设计了一台新低压涡轮。
The results show that the more deeper the nozzle immersion depth is , the less the molten steel velocity at the interface , the weaker the oscillation near the interface and the more difficult the occurrence of the slag entrapment become . compared with the round entry nozzle , the rectangular entry nozzle can reduce the occurrence of the slag entrapment 结果表明:采用较大的水口浸入深度可以减小表面速度,抑制液面波动,避免钢渣卷混的产生;与圆形水口相比,长方形水口能有效地减小卷渣发生的可能性。
Several axial turbine and compressor geometry profile designs are presented . also some turbine and compressor sample cascade design cases and their calculated performance for different prescribed conditions are given and discussed . in the design procedure , the presented method in the paper shows its applicability and effectiveness , especially for modification of the proscribed velocity distribution 本文对多个涡轮、压气机算例进行了优化设计和流场计算检验,结果表明,本文所提出的方法能对叶片表面速度分布进行有效调节,减少了很多人工调控因素,使叶型设计技术得到了进一步的完善和提高。