High response measurement of exhaust gas temperature from an engine by using laser interferometry with two wavelength

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14513
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Naval and maritime engineering
• Research Institution: Okayama University
• Principal Investigator: TOMITA Eiji 岡山大学, 自然科学研究科, 教授 (80155556)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 燃焼 / 非定常温度計測 / 排気ガス / レーザー干渉法

Outline of Final Research Achievements

It is necessary to utilize exhaust gas effectively for achieving higher thermal efficiency in internal combustion engines. In this study, a system that can measure transient temperature was developed during one cycle by using laser interferometry with high response. The exhaust gas temperature was measured with this optical system separated from the engine slightly. The temperature showed a small decrease followed by rapid increase. Thereafter, it decreased gradually with piston rising and showed its maximum value near 90 degrees before top dead center followed by gradual decrease. However, analysis method was considered in detail due to lack of reliability of data accuracy. When the experiment of rapid temperature change was performed with a heater, the temperatures obtained with two wavelengths agreed with each other.

Free Research Field

船舶海洋工学，熱機関，熱工学，燃焼，レーザー計測