Basic Facts

Question 1

gas dynamics (definition)

Answer 1

science of fluid flow in which both density and temperature changes become significant

Question 2

For 5 percent change in temperature, gas dynamics is the science of flow fields with speeds Mach ____ and above

Answer 2

0.5

(standard sea level conditions)

Question 3

flow property changes caused by a Mach wave are ______

Answer 3

insignificant

Question 4

when the flowfield is supersonic, the entire flow field is dominated by

Answer 4

Mach waves

expansion waves

shock waves

Question 5

fluid mechanics (definition)

Answer 5

science of fluid flow in which the temperature changes associated with the flow are insignificant (isenthalpic)

(can be compressible or incompressible)

Question 6

compressible flow

Answer 6

science of fluid flow where the density change associated with pressure change is significant

Question 7

theory of gas dynamics, changes in state occur by these three means

Answer 7

area change (isentropic flow)

friction (Fanno flow)

heat transfer (Rayleigh flow)

Question 8

volume flow rate equation

Answer 8

A, cross-sectional area

vel, velocity

Question 9

mass flow rate equation

Answer 9

Question 10

measure of compressibility

(name and equation)

Answer 10

volume modulus of elasticity E

Question 11

neglect compressibility below this Mach number

Answer 11

0.3

Question 12

definition of Mach number

Answer 12

Question 13

equation for speed of sound for a perfect gas

Answer 13

Question 14

equation for speed of sound for hypersonic speed gas (non-perfect gas)

Answer 14