风洞是空气动力学研究的重要地面试验设备，是保证一个国家航空航天处于领先地位的基础研究设施。
Wind tunnels are important ground facilities for aerodynamic research, and basic research establishment to ensure aeronautics and astronautics of a country keeping ahead in the world.
它是以能量平衡和空气动力学原理为基础的多因子公式。
The formula is based on energy balance and the principles of air dynamics, including many parameters each of which has special physical definition.
通过风力机空气动力学分析和模型研究，为变桨距控制提供了理论基础。
Based on the research of wind turbine aerodynamics characteristics, a model was established and the theoretical foundation of pitch control was built.
首先对风力机空气动力学和变桨距控制过程进行了探讨，为系统的设计及控制策略的研究提供理论基础。
First, wind turbine aerodynamics and variable pitch control process was discussed to provide theoretical studying basis for studying of the system design and control strategy.
射流感应破裂荷电是一种以静电学、两相流理论及空气动力学理论为基础的能产生超高荷质比带电液滴的新技术。
The droplet size and the charge to mass ratio are measured by developed device of particle charge to mass ratio and reagent of catching fuel droplets.
射流感应破裂荷电是一种以静电学、两相流理论及空气动力学理论为基础的能产生超高荷质比带电液滴的新技术。
The droplet size and the charge to mass ratio are measured by developed device of particle charge to mass ratio and reagent of catching fuel droplets.
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