Distinguish between static and stagnation pressures. (e.g.) Fluid in a reservoir (or) in a settling chamber. The state of a fluid attained by isentropically decelerating it to zero velocity at zero elevation is referred as stagnation state. Explain the meaning of stagnation state with example. M = ce elasticfor ertiaforce int = KA Ac 2 ρ where K = Bulk modulus of elasticity K = ρ a 2 ∴ M = a c Aa Ac = 2 2 ρ ρ 4. Mach number is a non-dimensional number and is used for the analysis of compressible fluid flows. Define the mach number in terms of bulk modulus of elasticity. s W gZ c h gZ c h + + + = + + 2 2 2 2 1 2 1 2 2 1 Adiabatic energy equation is h 0 = h + ½ c 2 3. Write the steady flow energy equation for an adiabatic flow of air. Fluid velocities are small compared with the velocity of sound 2. Compressibility factor is greater than one. Fluid velocities are appreciable compared with the velocity of sound 2. What is the basic difference between compressible and incompressible fluid flow? Compressible Incompressible 1.
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