2009 Fiscal Year Final Research Report

A study on formulation and numerical analysis of the flow field of a submerged water jet.

Research Project

Project/Area Number	20760120
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Fluid engineering
Research Institution	Asahikawa National College of Technology
Principal Investigator	EGASHIRA Ryu Asahikawa National College of Technology, 機械システム工学科, 准教授 (60455102)
Project Period (FY)	2008 – 2009
Keywords	混相流 / キャビテーション
Research Abstract	When we analyze the cavitation behavior in a submerged water jet, the compressibility of a liquid should not be omitted. However, an added inertia force equation which is absent from that compressibility has been used in the conventional averaged equations based on a two-fluid model. In this study, the added inertial force equation where the compressibility was considered was adopted, and then it was revealed that the compressibility does not affect the past analytical results in the range of linear problem. And furthermore, the numerical simulation of a heat transfer problem in the liquid single phase was performed, and the validities of the computation method and results were confirmed.