A new type of thin-film heat transfer gauge with high spatial resolution and fast response is proposed for the measurement of the heat flux in wind tunnels with a long flow duration. The principle of the sensor is based on measuring the temperature gradient across a thin, heat-resistant layer of SiO with two, thin-film resistance thermometers on its upper and lower surfaces. These thin films and heat-resistant layer are deposited by the vacuum evaporation technique. The design consideration, the accuracy of the sensor, and the calibration technique are discussed. The sensor is applied to the measurement of the heat flux in a turbulent boundary layer on a flat plate at a Mach number of 4, a wall temperature ratio of 0. 64 and a Reynolds number of 1. 4 multiplied by 10**7.
|Number of pages||11|
|Journal||Transactions of the Japan Society for Aeronautical and Space Sciences|
|Publication status||Published - Aug 1 1987|
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Space and Planetary Science