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How is the flow compressed in an ideal supersonic wind tunnel inside a diffuser?

How is the flow compressed in an ideal supersonic wind tunnel inside a diffuser? Correct Answer Isentropic

In an ideal supersonic diffuser, the air is slowed to subsonic speed and then expended to the atmosphere. This is done by isentropic compression as ideally there should be no loss in total pressure.

Related Questions

Train A and B of equal lengths of 120m are moving towards a 300 m long tunnel. Train B enters the tunnel after 30 seconds when train A entered the tunnel. Train A crosses the tunnel in one minute. If both of them leave the tunnel at the same time, then what is the speed of train B?
A train is traveling at a speed of 96 kilometers per hour. It takes 3 seconds to enter a tunnel and 30 seconds more to pass through it completely. Which of the following statements are correct? A. Length of the tunnel is 100 meters B. Tunnel is longer than train C. Train is longer than the tunnel D. Length of the train is 80 meters E. Length of the tunnel is 800 meters Choose the correct answer from the options given below:
A train approaches a tunnel XY. There is a dog located inside the tunnel at a point that is 3/8 of the distance XY measured from the entrance X. When the train whistles the dog gets scared and runs. If the dog moves towards the entrance of tunnel X, the train catches the dog exactly at the entrance of the tunnel. If the dog moves to exit Y, the train catches the dog at exactly the exit. Find the ratio of the speed of dog and train.
Train A takes 45 seconds to cross a tunnel while train B of same length takes 75 seconds to cross the same tunnel. The ratio of length of train and length of tunnel is 2 : 3. How long is the tunnel if the difference in the speeds of train is 20 m/s?
The cut of a tunnel face is shown in given figure. This is called
Tunnel Engineering mcq question image
A train approaches a tunnel PQ. Inside a tunnel there is a rat at a point, the distance of which from P is equal to 5/12th of the length of PQ. When the train whistles, the rat runs towards the Point P of the tunnel to get exit then the Train catches it at Point P and if rat moves towards the Q for the exit then the Train catches it at Point Q. The speed of the train is how many times more than the speed of the rat?
A train approaches a tunnel AB. Inside the tunnel is a cat located at a point that is $$\frac{3}{8}$$ of the distance AB measured from the entrance A. When the train whistles, that cat runs. If the cat moves to the entrance A of the tunnel, the train catches the cat exactly at the entrance. If the cat moves to the exit B, the train catches the cat at exactly the exit. The ratio of the speed of the train to that of the cat is of the order :
Statement (I) : When a bluff body moves at supersonic speed in still air, an attached shock wave is produced at its nose causing the flow to be subsonic behind the shock plane. Statement (II) : A normal shock always transforms supersonic flow into subsonic flow causing increase in pressure, temperature and entropy.
Which of these results in decrease of the flow inside the actual supersonic diffuser?
Which of these properties remain constant in the ideal isentropic supersonic diffuser?