Practice Stagnation Enthalpy (2.3) - Compressible Flow

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6 sample questions

Question 1.
What is stagnation enthalpy?
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Think about what happens to energy when a fluid stops moving.
Question 2.
Write the equation for stagnation enthalpy.
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What two energies does this equation combine?
3Question 3.
What formula represents stagnation enthalpy?
- h₀ = h + V²/2
- h₀ = h - V²/2
- h₀ = V²/2 - h
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Focus on how energy components combine.
4Question 4.
Does stagnation pressure increase or decrease across a normal shock?
- True
- False
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Think about energy conservation and losses in compressible flow.
Question 5.
A gas flows through a nozzle with a static enthalpy of 300 kJ/kg at a velocity of 20 m/s. Calculate its stagnation enthalpy and explain what this means for the flow.
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Remember, evaluate both static and dynamic components.
Question 6.
In a supersonic flow, if stagnation enthalpy increases by 50 kJ/kg after a shock, what can be inferred about the flow behavior and energy loss?
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Consider the relationship between stagnation properties and shock occurrence.

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