| Project/Area Number |
15K13863
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Fluid engineering
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
Iga Yuka 東北大学, 流体科学研究所, 准教授 (50375119)
|
|---|
| Project Period (FY) |
2015-04-01 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2016)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
|
|---|
| Keywords | キャビテーション / 溶存気体 / 析出 / 数値解析 / 相変化 / 溶存空気 / CFD |
|---|
| Outline of Final Research Achievements |
A first, depression evaporation test was done. It was shown that vapor pressure becomes higher according with increase of dissolved air. Next, dissolved oxygen (DO) measuring apparatus was added cavitation tunnel. The DO value can be measured in during operation of cavitation test.
Next, numerical analysis of cavitation was done with taking into account of precipitation of dissolved air. In the present homogenous model of cavitation, because gas liquid interface is coarse grained, precipitation and dissolution can not be treated in the model. Then macroscopically pseudo phase equilibrium model with local void fraction is considered. Precipitation pressure was modeled by using seven types of dynamic stimulations. In the numerical result, under estimation of cavity volume and lift of hydrofoil by existing cavitation model was revised and the accuracy of estimation of cavitation is improved.
|
