AE401

The normal shock is a special case in the family of oblique shocks in which the wave angle is equal to:

• 45 deg

• 0 deg

• 90 deg

• 60 deg

Which of the following best describes the flow across the normal shock?

• isentropic

• irreversible, non-adiabatic

• adiabatic, non-isentropic

• reversible, non-adiabatic

Which of the following parameters experience an increase across the normal shock produced by a supersonic flow?

• total temperature

• static pressure

• velocity

• all of the answers

• 6

• 1/7

• 0.378

• 2.45

Which of the following parameters is constant across the normal shock wave?

• Static Temperature

• Entropy

• Stagnation Pressure

• Total Enthalpy

For a normal shock, which of the following parameters increase without bound as the upstream Mach number approaches infinity?

• temperature ratio

• density ratio

• downstream Mach number

• all of the choices

In the case of the infinitesimally weak normal shock, which of the following is true?

Ahead of the normal shock, static pressure, static temperature, and Mach number are 0.5 atm, 250 K, and 2.5, respectively. What is the static pressure downstream the shock?

• 3.56 atm

• 3.50 atm

• 3.65 atm

• 3.60 atm

Consider freestream flow under standard sea level conditions. A pitot tube placed against the flow registers a pressure of 17.64 psi. Find the Mach number of the freestream flow.

• 0.525

• 0.155

• 0.712

• 0.517

Consider airflow producing a density ratio of 2.5 across a normal shock wave. If upstream properties correspond to standard sea level conditions, find the upstream total pressure.

• 4.4 atm

• 5.5 atm

• 6.6 atm

• 7.7 atm