摘要: Temperature and velocity are important parameters for the characterization of high-speed flows. Precise experimental measurements of these two quantities are needed to provide joint statistics that are important for developing acc... 展开 Temperature and velocity are important parameters for the characterization of high-speed flows. Precise experimental measurements of these two quantities are needed to provide joint statistics that are important for developing accurate heat transfer models in computational fluid dynamics (CFD) simulations. Hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering (CARS) provides non-intrusive thermometry with high precision and accuracy. Femtosecond laser electronic excitation tagging (FLEET) allows for velocimetry measurements without tracer species or particles. This work evaluates the feasibility of achieving high precision in each of the two quantities to enable the accurate measurements of the joint statistics in the fluctuations of temperature and velocity. These two techniques are performed simultaneously in the freestream of a high-speed wind tunnel operating with nitrogen at Mach 3 and higher. Additional measurements are collected within the boundary layer to evaluate the change in precision due to turbulence. The accuracy and precision of the measurements are evaluated, and strategies for improving the measurement of joint statistics are discussed. These data are used to evaluate the feasibility of performing such measurements at rates up to 1 kHz for the study of turbulent convective heat transfer in high-speed flows. 收起