Exam 1 Flashcards
(22 cards)
Stream lines
Lines that indicate how air flows around an air foil
Lines that indicate how air flows around an air foil
Stream - lines
Stream tube
collection of stream lines
collection of stream lines
Stream tube
Stagnation stream lines
lines that terminate at or originate from an airfoil
lines that terminate at or originate from an airfoil
Stagnation stream lines
Continuity equation
ρAV = ρ’A’V’
ρAV = ρ’A’V’
Continuity equation
Bernoulli’s Equation
P+0.5ρV^2 =P’+0.5* ρ*V’^2=Po
P+0.5ρV^2 =P’+0.5* ρ*V’^2=Po
Bernoulli’s Equation
What does the equation ΔP=0.5ρV^2 demonstrate?
static pressure is always equal to dynamic pressure
What are the two fluid flow types?
Compressible and Incompressible
Compressible Flow
Flow in which the density of a fluid can change from point to point
Incompressible Flow
Flow in which the density of a fluid remains constant
Flow in which the density of a fluid remains constant
Incompressible Flow
Flow in which the density of a fluid can change from point to point
Compressible Flow
Name the four forces acting on an aircraft in the air
1) Thrust
2) Lift
3) Drag
4) Weight
What two forces acting on an aircraft are concerned with aerodynamics
1) Lift
2) Drag
What are the 2 basic sources of an aerodynamic force?
1) Pressure
2) Frictional shear stress
Pressure acts _____ to a surface, shear stress acts ____ to a surface
perpendicular; tangentially
What are the four fundamental properties of a flowing gas (a.k.a. - the 4 properties of a flow field)?
1) Pressure (P)
2) Density (ρ)
3) Temperature (T)
4) Velocity (V)
Equation of state
P = ρRT
