Abstract
Pitot pressure may be used as a measure of stream thrust in supersonic reacting flows. Previous work has assumed ideal, perfect gas behavior. This paper extends the analysis to chemically reacting flow. The effect of probe size on the measured pitot pressure is explored. Large probe sizes produce higher pitot pressure than smaller probes. However, even the largest probe sizes do not approach the chemical equilibrium pitot pressure limit because of entropy generation behind the shock attributable to finite-rate chemical reactions. Small probe sizes do approach the frozen chemistry pitot pressure limit. The frozen and equilibrium limits are separated by approximately 10 percent, but the pitot pressures computed with finite-rate chemistry varies less than 3 percent regardless of probe size. This reduces the uncertainty associated with inferring stream thrust from pitot pressure measurements in reacting flows. Conditions typical of a typical storable propellant rocket are considered. These calculations will guide the choice of probe sizes in reacting flows, and provide an indication of the uncertainty associated with inferring stream thrust from pitot pressure in reacting flows.
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.