It is widely used in the range of vehicles . with the development of computational fluid dynamical ( cfd ) and finite element analysis technology , it is possible to utilize the simulation results to analyze the internal flow and design the oil pump 近年来,随着计算流体力学( cfd )和有限元技术的发展,从研究机油泵内部流动机理出发,使用数值仿真结果来指导泵的设计已经成为可能。
Wind tunnels are essential for research and teaching of aerodynamics ; they provide a major means for discovering and confirming airflow phenomena , exploring and revealing airflow mechanism , seeking and understanding airflow rules , and providing fine aerodynamic configuration and aerodynamic characteristic data for aircraft design . the development of advanced wind tunnel is the prerequisite for t enhancing accuracy and standard of wind tunnel experiments , playing an important role in improving product aerodynamic design 风洞是空气动力学科研和教学的必要条件，是发现和确认流动现象、探索和揭示流动机理、寻求和了解流动规律，以及为飞行器设计提供优良的气动布局和空气动力学特性数据的主要手段，先进风洞的建设，是提高风洞实验精度及水平的前提，对提高产品的气动设计质量具有重要的作用。
Experimental investigation described in the paper may contribute to the development of internal flow study in solid rocket motors . the result is not only conducive to understand the mechanism of aft - end internal flow , but also available for reference to the design of solid rocket motors . the detailed measurement data can act as data - base to verify the accuracy of numerical simulation 本文的冷流模拟工作对于固体火箭发动机内流场研究的发展具有一定的贡献，实验结果有助于提高对燃烧室尾部流动机理的认识水平，可以为发动机设计提供参考，也可以作为数据库来校验数值模拟的准确度。
According to the characteristics of the duty management and the cost management , the paper put analytic point into the problem of establishing the development cost duty management mode , and it put forward the theory about cost duty flow management , and take production of cost duty flow and its movement process as clues , it analyzed the basic concept , constitute key element and flow mechanism of the cost duty flow 根据成本管理和责任管理的特点，本文将分析的着眼点放在建立动态的成本责任管理模式问题上，提出了成本责任流管理理论，以成本责任流的产生、运动过程为线索，对成本责任流的基本概念、构成要素和流动机理进行了分析。
