Observation of local energy conversion and entropy production in a thermoacoustic heat engine

Research Project

Project/Area Number	20760044
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Applied physics, general
Research Institution	Tohoku University
Principal Investigator	BIWA Tetsushi Tohoku University, 大学院・工学研究科, 准教授 (50314034)
Project Period (FY)	2008 – 2009
Project Status	Completed (Fiscal Year 2009)
Budget Amount *help	¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000) Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000) Fiscal Year 2008: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords	流体 / 熱工学 / エネルギー変換 / 熱音響工学 / エントロピー生成
Research Abstract	Thermoacoustic energy conversion was experimentally studied through simultaneous measurements of pressure, velocity, and temperature oscillations in a gas-filled tube with axial temperature gradient. The phase difference between pressure and velocity was found out to be a key parameter governing the phasing of thermodynamic processes constituting a thermodynamic cycle. Also, the axial work flow (acoustic power) was found to increase in proportional to the local energy conversion rate that the gas executed. This results supports the thermodynamic approach to thermoacoustic phenomena.

Report

(3 results)