Transcription of Introduction to Compressible Flow - University of Utah
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1 Introduction to Compressible Flow0 DtD The density of a gas changes significantly along a streamlineCompressible FlowDefinition of Compressibility: the fractional change in volume of the fluid element per unit change in pressure ppppvdpp+dpp+dpp+dpp+dvv Compressible Number:2. Compressibility becomes important for High Speed Flows where M > M < Subsonic & incompressible <M < Subsonic & Compressible <M < transonic flow shock waves appear mixed subsonic and sonic flow regime <M < - Supersonic shock waves are present but NO subsonic flow M > Hypersonic Flow, shock waves and other flow changes are very strongsound of speed velocitylocal==cVM2 Compressible Flow3.
• Equation of State – Ideal Gas Law p =ρRT Temperature is absolute and the specific volume is ... Exhaust gasses passing through the blades of a turbine. 2. Diffuser near the front of a jet engine 3. Nozzles on a rocket engine 4. A broken natural gas line
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