简介了液力调速节能减排的效果。给出了计算调速节能效果的两种方法。介绍了液力耦合器结构、调速原理及其特点,得出了调速运行是风机节能有效途径的结论。

介绍了液力耦合器的应用特点、特性参数,并对节能效益进行了分析;简介了冷却器的选择计算方法。

针对新建电厂对选择液力耦合器 (YOT GCD系列 )应予注意驱动电机的转向与耦合器轴系上锁紧螺母转向的问题 ,对已投用的液力耦合器存在的问题作防范性检查 ,并提出了原因分析及处理方案。

采用CFD方法对某离心风机流场进行计算,首先将计算所得的风机总压升和效率与试验数据进行对比,验证了计算方法的准确性和可靠性。再对比计算不同叶片尾缘形状对风机气动性能的影响,通过叶轮流场速度矢量和相对马赫数的分布,对比各计算模型之间的差别,得出结论椭圆型尾缘有助于改善叶片出口流动,提高叶轮效率,但也会导致叶轮总压升的降低。

Aerodynamic design of convertible prop-rotor is a challenging and complex task.Instead of focus on a design condition,prop-rotor are requested to attain good performance in wide range of operating conditions.In present work,to further improve performance of prop-rotor under each operating condition,the concept of variable-pitch proprotor has been proposed.However,a compromising aerodynamic design of prop-rotor is inevitable,due to discrepancy of operating condition.Consequently,a multi-objective optimization is implemented with genetic algorithm.Factors which has significantly influenced on aerodynamic characteristics of prop-rotor are employed as design variable.To avoid expensively computational cost,two theories has been implemented and validated while it able to provide a promising result without high consuming of time.Eventually,several designed individuals within different performance has been analyzed and discussed.Subsequently a calculation of aerodynamic characteristic with hi...

本风室试验台通过采用5个喷嘴组合,有效地保证了整个风量范围的测量精度。风室采用可移动的低噪声辅助风机箱,满足了风室进气、出气试验的类型转换的要求。本风室试验系统的测试与控制程序是在Labview平台下实现的,具有自动和手动两种功能。

从气动声学理论出发,探讨了贯流式风机气动噪声机理及不等节距叶片频率调制降噪的机理.

介绍了一种与通风机配套的阻性片式消声器的消声性能及其结构特点,着重阐述了阻性片式消声器的设计过程.

采用微穿孔板吸声结构,对某型单级轴流压缩机排气噪声进行了降噪研究.详细计算了消声器的参数并进行了测量比较.试验表明,微穿孔板吸声结构可有效地降低排气噪声.