Applied Thermodynamics | Compressible Flow by Pavan | Learn Smarter
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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.

Sections

  • 1

    Basics Of Compressible Flow

    This section introduces the fundamentals of compressible flow, focusing on the behavior of gases under varying density, pressure, and temperature conditions.

    Learning Practice

  • 2

    Stagnation Properties

    Stagnation properties are critical values that indicate the conditions of a fluid if it is brought to rest isentropically.

    Learning Practice

  • 2.1

    Stagnation Temperature

    Stagnation temperature is the temperature a fluid would achieve if brought to rest isentropically and is crucial in analyzing compressible flow.

    Learning Practice

  • 2.2

    Stagnation Pressure

    Stagnation pressure refers to the pressure a fluid would have if brought to rest isentropically, essential for analyzing compressible flows.

    Learning Practice

  • 2.3

    Stagnation Enthalpy

    Stagnation enthalpy represents the total enthalpy a fluid would have if brought to rest isentropically.

    Learning Practice

  • 3

    Isentropic Flow Of A Perfect Gas Through A Nozzle

    This section discusses isentropic flow in nozzles, covering key principles, flow conditions, and their significance in compressible flow.

    Learning Practice

  • 3.1

    Key Relations

    This section explores critical correlations in compressible flow, particularly in isentropic processes and the behavior of fluids in nozzles and diffusers.

    Learning Practice

  • 3.2

    Flow Conditions

    This section examines the varying flow conditions in compressible flows, particularly addressing subsonic and supersonic flows through nozzles and the concept of choked flow.

    Learning Practice

  • 4

    Choked Flow, Subsonic And Supersonic Flows

    This section discusses choked flow, highlighting the characteristics of subsonic and supersonic flows.

    Learning Practice

  • 5

    Normal Shocks

    Normal shocks refer to abrupt changes in flow properties that occur in supersonic flows, resulting in a decrease in Mach number and an increase in pressure and temperature.

    Learning Practice

  • 5.1

    Conservation Across A Normal Shock

    This section discusses the concept of normal shocks in supersonic flows and the conservation equations associated with the phenomena.

    Learning Practice

  • 6

    Ideal Gas Tables

    Ideal Gas Tables are tools used to retrieve key property values for compressible flows, particularly in isentropic flows and normal shock relations.

    Learning Practice

  • 6.1

    Tables Provide Values Of

    This section introduces ideal gas tables and their usage in determining property values for compressible flows, particularly in isentropic conditions and normal shock relations.

    Learning Practice

  • 7

    Flow Of Steam And Refrigerant Through Nozzles

    This section discusses the flow characteristics of steam and refrigerants through nozzles, highlighting the need for real fluid property tables.

    Learning Practice

  • 7.1

    Supersaturation

    Supersaturation occurs in steam nozzles when vapor expands rapidly and condensation lags, deviating from equilibrium flow assumptions.

    Learning Practice

  • 8

    Compressible Flow In Diffusers

    This section discusses the behavior of compressible flow in diffusers, focusing on how diffusers affect flow speed and pressure.

    Learning Practice

  • 8.1

    Flow Behavior

    This section covers the fundamental concepts of compressible flow, including key equations, stagnation properties, flow types, and the behavior of flow through nozzles and diffusers.

    Learning Practice

  • 8.2

    Nozzle And Diffuser Efficiency

    This section covers the efficiency of nozzles and diffusers in compressible flow, detailing how isentropic efficiency is defined for both components.

    Learning Practice

References

Module IV_ Compressible Flow.pdf

Class Notes

Memorization

What we have learnt

  • Compressible flow is charac...
  • Stagnation properties provi...
  • Isentropic flows occur in p...

Final Test

Revision Tests