Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (4): 106-110.

• Mechanical Engineering • Previous Articles     Next Articles

Boundary Efect of Large Opening with Nozzle Structure on Ellipsoidal Head

Guo Chong-zhi  Chen Wen-xin  Ji Chang-sheng   

  1. Coilege of Industrial Equipment and Control Engineefing,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-05-11 Online:2006-04-25 Published:2006-04-25
  • Contact: 郭崇志(1956-)，男，博：上牛，副教授，主要从事过程装备系统分析设汁及汁算机辅助工程技术研究． E-mail:guoehongz@ gmail.com
  • About author:郭崇志(1956-)，男，博：上牛，副教授，主要从事过程装备系统分析设汁及汁算机辅助工程技术研究．

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Abstract:

The general feature of the large opening with nozzle structure on ellipsoidal head. in which the propertv of the head is influenced by two interferential boundaries ,are investigated in this paper.It is found that.although the two interferential boundaries are very close to each other when the ratio of ope-ning achieves 90% (r/R=0. 9).the single boundary effect at the nozzle side also applies to the analysis of stress concentrafton with the presence of two boundaries.This conclusion provides some necessary modifications to the traditional point of view.which holds that in large opening structure,fhe interference& inference of two boundaries in short distance should be taken into consideration when analyzing the boundary effect.The research lays a foundation for the engineering design with more simplicity.

Key words: ellipsoidal head, large opening, nozzle, boundary effect