Free Printable AERODYN3 2

1.

One of the most useful equations in solving properties of expansion waves is shown on the left. This is also called the ________.

a)

Prandtl-Meyer Function

b)

Prandtl-Glauert Function

c)

Von Karman-Tsien Function

d)

Buseman Function

2.

Whenever a supersonic flow is turned away from itself, expansion waves will occur. The surface corner is _______.

a)

flat

b)

concave

c)

convex

d)

vertical

3.

The following parameters will decrease across the expansion wave except:

a)

velocity

b)

pressure

c)

temperature

d)

density

4.

Since the expansion of the flow through the wave occurs across a continuous succession of Mach waves, the change in entropy for each Mach wave is zero. Thus, the flow is said to be ________.

a)

polytropic

b)

isentropic

c)

isobaric

d)

isometric

5.

It is the angle that the upstream Mach wave of the expansion fan makes with respect to the upstream flow.

a)

$\mu_2$

b)

$\nu\left(M_1\right)$

c)

$\theta$

d)

$\mu_1$

6.

Which of the following formula will give the deflection angle of the expansion corner?

a)

$\nu\left(M_2\right)-\nu\left(M_1\right)$

b)

$\nu\left(M_1\right)-\nu\left(M_2\right)$

c)

$\nu\left(M_2\right)+\nu\left(M_1\right)$

d)

$\nu\left(M_2\right)\div\nu\left(M_1\right)$

7.

Which of the following formulas will give the value of the Mach angle?

a)

$\sin\left(\frac{1}{M}\right)$

b)

$\sin^{-1}\left(\frac{1}{M}\right)$

c)

$\sin^{-1}\left(M\right)$

d)

$\frac{1}{\sin^{-1}\left(M\right)}$

8.

An increase in the Mach number will cause ______ in the Mach angle.

a)

a value of 0

b)

no changes

c)

an increase

d)

a decrease

9.

The flow downstream of the isentropic expansion fan is __________ the upstream Mach number.

a)

supersonic and lower than

b)

subsonic and higher than

c)

supersonic and higher than

d)

subsonic and lower than

10.

Consider isentropic expansion waves. Which of the following parameters is not constant across the wave.

a)

Total Density

b)

Total Temperature

c)

Static Pressure

d)

Total Enthalpy

AERODYN3 2

Total questions: 10

Worksheet time: 5mins

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