ME6604 Important questions Gas Dynamics and Jet Propulsion
ME6604 important questions Gas Dynamics and Jet Propulsion Regulation 2013 Anna University free download. Gas Dynamics and Jet Propulsion important questions free pdf download.
Sample ME6604 important questions:
1. Distinguish between compressible fluid and incompressible fluid flow. (Nov/ Dec- 2006)
Ans: Density is constant for incompressible fluid flow and it is variable for
incompressible fluid flow. The compressibility factor is one for incompressible fluid and is less than one for compressible fluid. Examples are incompressible fluid – water, oil and compressible fluid – air, hydrogen.
2. Define velocity of sound. What is the velocity of sound in air at 27oC? (May 2009)
Ans: The velocity of sound is defined as the velocity at which pressure waves are transmitted through the medium. The velocity of sound in air is calculated by a RT .
3. Define Mach number. (Apr/May- 2008)
Ans: Mach number is defined as the ratio of local velocity of fluid to local sonic velocity at the same point.
4. Define stagnation state and stagnation enthalpy. (Nov/Dec-2009)
Ans: The stagnation state of a fluid is defined as the state of the fluid attained, when the flow is isentropically decelerated to zero velocity at zero elevation. Stagnation enthalpy of a gas is its enthalpy when it is isentropically decelerated to zero velocity at zero elevation.
5. What is the difference between nozzle and diffuser?
Ans: Nozzle is a device in which there is an increase in the velocity and decrease in the pressure. Diffuser is a device which there is a decrease in the velocity and increase in the pressure.
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Gas Dynamics and Jet Propulsion Syllabus