Open Access

ARTICLE

An Analysis of the Factors Influencing Cavitation in the Cylinder Liner of a Diesel Engine

by Dehui Tong^1,2, Shunshun Qin^1,2,*, Quan Liu^1,2, Yuhan Li³, Jiewei Lin^2,3

1 State Key Laboratory of Engine Reliability, Weifang, 261061, China
2 Weichai Power Co., Ltd., Weifang, 261061, China
3 State Key Laboratory of Engines, Tianjin University, Tianjin, 300350, China

* Corresponding Author: Shunshun Qin. Email:

Fluid Dynamics & Materials Processing 2022, 18(6), 1667-1682. https://doi.org/10.32604/fdmp.2022.019768

Received 13 October 2021; Accepted 22 February 2022; Issue published 27 June 2022

Abstract

Avoiding cavitation inside the water jacket is one of the most important issues regarding the proper design of a diesel engine’s cylinder liner. Using CFD simulations conducted in the frame of a mixture multiphase approach, a moving grid technology and near-wall cavitation model, in the present study the factors and fluid-dynamic patterns that influence cavitation are investigated from both macroscopic and mesoscopic perspectives. Several factors are examined, namely: wall vibration, water jacket width, initial cavitation bubble radius, coolant temperature, and number of bubbles. The results show that reducing the cylinder liner vibration intensity can significantly weaken the cavitation. Similarly, increasing the water jacket width is instrumental in avoiding cavitation. Increasing the coolant temperature reduces the microjet velocity related to bubble collapse, while increasing the number of bubbles produces a much larger water hammer pressure that can cause more damage to the cylinder liner.

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Keywords

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