Application of slotted technique on splitter blade in centrifugal fan;
长短叶片开缝技术在离心风机设计中的应用
For a transonic radial inflow steam turbine,the aerodynamic design optimization analysis is conducted by means of three-dimensional numerical simulation,and the aerodynamic characteristic of TC-4P profile is presented through varying blade number and long-short blade configuration and analyzing an effect on the inner flow field of impel- ler.
利用三维数值模拟的方法对一跨音速向心汽轮机进行了气动设计优化分析,通过改变叶片数和采用长短叶片结构等方法分析其对叶轮内流场的影响,分析了TC-4P叶型的气动特点。
Afforestation of Calamus egregius and Daemonorops margaritae by Tube-Seedlings;
短叶省藤和黄藤组培苗造林研究
In vitro conservation of germplasm of Calamus egregius;
短叶省藤种质离体培养保存研究
It mainly infected Pinus taeda, P.
研究表明在火炬松、湿地松、短叶松和马尾松健康梢上整年都能分离到松枯梢病菌 ,其中在火炬松上的得菌率为 15 %～ 37 7% ,且大多数月份高于 2 0 % ;湿地松上的得菌率稍低于火炬松 ,为 7 5 %～ 2 9 1% ;短叶松梢上的得菌率是 13 8%～ 5 7 1% ,月份之间的差异较大 ;马尾松得菌率最低 ,为 9 7%～ 2 2 4 % ,多数分离得菌率低于 2 0 %。
So in this paper, the 3-D numerical simulation of G4-73№8D centrifugal fan and five other impellers with different splitter blades installed are carried out with Numeca basing on the S-A model in order to investigate the flow field inside the blade wheel, and the best relatively position is put forward.
本文针对某些风机管道系统需要扩容改造的工程实际需要,以G4-73№8D型风机为研究对象,基于S-A湍流模型,利用Numeca对其原叶轮以及五种不同位置加装短叶片叶轮的内部三维流场进行了数值模拟,并提出了叶轮内加装短叶片的相对优化位置;在此基础上,进行了叶轮加装短叶片前后的对比实验。