Abstract
Experimental study of inclined jets cross flow interaction in compressible regime. II. Effect of injection rate on surface heat transfer. An experimental study of a row of jets entering in a transonic mainstream ( M=0.72) is carried out in order to investigate the influence of the injection rate, defined as the ratio of the mass fluxes per unit surface of the jet to the cross flow fluids, on the interaction of the two flows and on the wall heat transfer. The velocity field is derived from total pressure and temperature measurements. Infrared thermography technique is used to identify the wall surface heat transfer. Experiments are carried out for three values of the injection rate R=0.24, 0.37 and 0.50. The experiments indicate the existence of an optimum film effectiveness for a value of R close to 0.37. A higher injection rate leads to a higher penetration of the jet in the cross flow with an associated reduction of the film cooling effect due to the injection of cross flow fluid under the jets. A lower injection rate induces a higher mixing of the jet fluid with the incoming boundary layer flow which also reduces the film efficiency.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.