Paper Title:
Design of Ultrasonic Ejecting Gun Used for Surface Nanocrystallization Based on CFD
  Abstract

Supersonic fine particles bombarding (SFPB) is an important way to perform surface nanocrystallization. Harder the material is, higher the bombarding particles speed is needed. The gun with excellent features is premise to obtain the nano-structured layer.This paper analysed the advantages of rectangle Laval nozzle compared to annular-shape one and calculated critical structured parameters of the nozzle.Numerical simulation analysis of flow field of the nozzle at inlet temperature 300K and inlet pressure 0.25 MP, 1.0 MP, 1.7 MP and 2.5MP and velocity field of the gun with divergent-angle extended-barrel conduced by a commercial finite volume code FLUENT software of CFD; Consequently, the overall structure of the gun was optimized and determined finally. The sample of 38CrSi steel was treated by this gun. And the nano-structure layer on the surface was observed by TEM.

  Info
Periodical
Key Engineering Materials (Volumes 373-374)
Main Theme
Edited by
M.K. Lei, X.P. Zhu, K.W. Xu and B.S. Xu
Pages
794-797
DOI
10.4028/www.scientific.net/KEM.373-374.794
Citation
X.M. Wang, S. N. Ma, C.Q. Li, J. W. He, X.Q. Feng, "Design of Ultrasonic Ejecting Gun Used for Surface Nanocrystallization Based on CFD", Key Engineering Materials, Vols. 373-374, pp. 794-797, 2008
Online since
March 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Pu Qu, Qiang Li, Shu Fang Yang
Chapter 2: Experimental and Applied Mechanics
Abstract:In order to analyze the temperature fields, temperature grads, thermal stress and thermal strain of large caliber machine gun barrel during...
150