Measurements of engine combustion temperature by using coaxial TDLAS and CARS technique

Accurate measurement of engine combustor temperature is indispensable to optimize the design of engine, as well as establish and validate computational fluid dynamics model. This paper provides a temperature measurement device using coaxial TDLAS and CARS technique. The main work is to solve the problem of inconsistent detection area while using these two techniques, and make the two techniques shared the same transmitting part and the collecting part. The temperature measurement experiment was carried out on a model scramjet engine. The results show that the groove region segment within engine combustor (distant from the underside wall > 30 mm) has the highest temperature (about 2400 K) during kerosene burning period, while the rise of temperature at the position of less than 10 mm (distant from the underside wall) is not obvious.