Year-end Sale % OFF 
Abstract
The use of mass injection through a porous wall as a cooling technique for axisymmetric nozzles is investigated. The effect of homogeneous mass injection on the heat transfer in a turbulent, compressible boundary layer is analyzed, using an integral-momentum approach. Approximate formulations of the gaseous thermal radiative and recombination energy contributions are included in the analysis. Coolant requirements are determined for a conical nozzle associated with a 106 Ib-thrust gas-core system operating at a 300-atm chamber pressure. Hydrogen is assumed to be used for the propellant and coolant. Chamber temperatures range from 7500° to 20,000°R, and wall temperatures range from 2000° to 3000°R. The degradation of specific impulse, which is a result of expelling the coolant at a lower total temperature than that in the chamber, is found to be as high as 9% at 20,000°R for a wall temperature of 2000°R.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
