Flashcards in M1 Deck (52):

1

## Bernoulli's Equation

### ONLY FOR INVISCID INCOMPRESSIBLE FLOW

2

## inviscid compressible flow

###
density changes

kinetic energy changes

internal energy changes

Euler's equation MUST be used

3

## inviscid (def)

### frictionless

4

## incompressible (def)

### density is constant

5

## what remains constant in incompressible flow?

### temperature and density

6

## isentropic flow

### adiabatic and inviscid

7

## what states are variable during compressible flow

### pressure, density, temperature, velocity

8

## entropy (def)

### measure of energy of the system that is unavailable to produce work

9

## enthalpy (def)

### measure of heat content of system

10

## adiabatic (def)

### without gain or loss of heat

11

## isentropic (def)

### without gain or loss of entropy

12

## homogenous (def)

### density and composition are the same throughout

13

## specific heat (def)

### measure of heat capacity fo system

14

## stagnation condition (def)

### when flow is stopped isentropically and adiabatically (KE converted to heat or pressure)

15

## reversible (def)

### no friction

16

## the mach number for oblique and normal shock waves

### greater than 1

17

## downstream mach number for normal shockwave is always

### smaller than 1

18

## a pitot tube measures the

### total pressure, static pressure, air speed on aircraft

19

## static pressure (measures)

### only random motion of gas

20

## total pressure

### flow is isentropically decelerated to zero velocity

21

## combination of total pressure and static pressure allows one to measure

### velocity at a certain point

22

## constant entropy implies conservation of throughout system

### conversation of energy

23

## shock wave (def)

### thin region of highly viscous flow, a propagating disturbance when a wave moves faster than the speed of sound

24

## flow through shock wave is

### adiabatic but nonisentropic

25

## energy is what across shock wave?

### conserved

26

## synonym for shock wave

### propagating disturbance (PD)

27

## when a wave moves faster than the speed of sound in a fluid

### it's called a shock wave

28

## shock wave is characterized by

### abrupt discontinuous change in pressure, temperature, density

29

## if M>0.3

### flow is compressible

30

## adiabatic gas is what kind of gas

### calorically perfect gas

31

## total temperature is across stationary normal shock wave

### constant

32

## velocity and total pressure across normal shock wave

### decrease

33

## normal shock is

### adiabatic, nonisentropic

34

## normal shock equations are a function of only

### M1

35

## mach number behind shock wave is always

### smaller than one

36

## velocity and total pressure across normal shock wave

### decrease

37

## density, sPressure, and temperature across normal shock wave

### increase

38

## as M1 increases, p0,2/p0,1

### decreases

39

## total pressure is an indicator of how much

### useful work can be done by a flow

40

## sound wave is, but not isothermal

### IS ADIABATIC

41

## speed of sound travels 20x than in air

### faster

42

## for given upstream M1, there is a

### maximum deflection angle theta max

43

## if theta>theta(max)

### no solution exists for straight oblique shock, curved detached shock wave

44

## value of theta max increases as M1

### increases

45

## at higher Mach numbers, the straight oblique shock solution can exist at

### higher deflection angles

46

## for any give theta less than theta max

### two straight oblique shock solutions for a given upstream M exist

47

## smaller value of beta is called

### weak shock solution

48

## larger value of beta is called

### strong shock solution

49

## for strong solution, M2 is always

### subsonic

50

## for weak solution, M2 is usually

### greater than 1

51

## for theta values very close to theta max,

### M2 is less than one

52