A review of hot-wire technique in compressible flows

The use of hot wire anemometer for obtaining turbulence data in compressible flows is reviewed. Based on the existing experimental results, the methods of extracting different turbulent quantities from the output signal of the hot wire anemometer in a given flow environment are described and evaluated. Comparison between the results obtained with the laser Doppler velocimeter and the hot wire anemometer shows that the latter should still be considered as one of the main tools for turbulence research in compressible non-separated turbulent flows not only for its comparable accuracy but also for its much lower cost and ease of operation as compared with the optical methods.