|Table of Contents|

Numerical computation of water-hammer based on adaptive wavelet collocation method(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2019年05期
Page:
32-37
Research Field:
研究与设计
Publishing date:

Info

Title:
Numerical computation of water-hammer based on adaptive wavelet collocation method
Author(s):
XU Zhiyu1; 2;  TAN Yonghua2; 3;  LI Xiaoming1
(1.Xi’an Aerospace Propulsion Institute, Xi’an 710100, China; 2.Science and Technology on Liquid Rocket Engine Laboratory, Xi’an 710100, China; 3.Academy of Aerospace Propulsion Technology, Xi’an 710100, China)
Keywords:
water-hammer;  AWCM;  numerical computation
PACS:
V430
DOI:
-
Abstract:
In order to restrain the numerical oscillation of computing water-hammer problem using the traditional spectral method, an Adaptive Wavelet Collocation Method(AWCM)based on the compactly supported spline wavelet was established for the one-dimensional fluid motion equation.The water-hammer problems of one-dimensional pipeline with friction and without friction were numerically computed, and the propagation process of water-hammer wave was obtained.The results show that the Adaptive Wavelet Collocation Method can accurately compute the propagating process of water-hammer wave.At the wavefront, there will be no sharp numerical oscillation phenomenon due to the high resolution, and both the accuracy and resolution can be improved simultaneously.In addition, the method can automatically capture the position of water-hammer wave, and adopt the high resolution in the local area of water-hammer wave while reduce the resolution in the small gradient area, which save the computational cost largely on the premise of guaranteeing the accuracy and resolution.

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Last Update: 2019-10-25