The effects of mainstream turbulence intensity between 0.3 percent and 20.6 percent and turbulence scale between 0.06 and 0.33 jet entrance diameters on heated and unheated subsonic jets issuing from a row of inclined round holes into a turbulent boundary layer are reported. Time averaged and instantaneous velocities and the mean temperature are measured in the flow. The mainstream turbulence scale has a significant effect on the temperature distribution of the injected jets and on the instantaneous velocity profiles of the flow following injection. When the mainstream turbulence scale is large, the injected jets are well mixed with the mainstream; when the scale is small, the injected jets are well preserved and the effect of vortex motion upon the temperature distribution becomes significant.

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