Compressible Flow
Compressible flow involves fluids whose density changes under varying pressure and temperature, primarily applicable to high-velocity gases. Various governing equations, including the continuity, momentum, and energy equations, are essential for analyzing these flows. Key concepts such as stagnation properties, isentropic flow, and choked flow are crucial for understanding flow dynamics in nozzles and diffusers.
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What we have learnt
- Compressible flow is characterized by significant density changes with pressure and temperature.
- Stagnation properties provide insight into flow behavior when gases are brought to rest isentropically.
- Isentropic flows occur in processes involving converging and diverging nozzles, affecting velocity and Mach number.
Key Concepts
- -- Compressible Flow
- Flow in which the density of a fluid varies significantly with changes in pressure and temperature, typically observed in gases at high velocities.
- -- Stagnation Properties
- Properties that a fluid attains when brought to rest isentropically; includes stagnation temperature, pressure, and enthalpy.
- -- Choked Flow
- A condition in which the flow reaches the speed of sound at the throat of a nozzle, resulting in a maximum mass flow rate irrespective of downstream pressure.
- -- Normal Shocks
- A sudden change in flow properties, characterized by a decrease in Mach number to subsonic, and increases in pressure, temperature, and entropy.
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