
Consider an infinitely thin flat plate with a 1 m chord at an angle of attack of

The normal, axial, lift and drag forces, moment about the leading and quarter chord and the centre pressure.
Answer to Problem 1.4P
Normal force
Axial force
Lift force
Drag force
Moment about the leading
Moment about quarter chord
Centre of pressure
Explanation of Solution
Given:
Pressure on upper surface
Pressure on lower surface
Shear stress on upper surface
Shear stress on lower surface
Length of chord
Angle of attack
Calculation:
The normal force per unit span is,
Since the plate is thin
Then, normal force per unit span is,
Now, axial force,
Since the plate is thin
Then, axial force per unit span is,
Lift and drag force:
Lift
Drag
The equation of the moment about leading edge per unit span is,
Here, pu and pl is the pressure upper and below the plate, respectively.
Since the plate is thin,
Since shear stresses are also negligible, therefore,
Then, from above equation the moment about leading edge per unit span is,
Again, the moment about the quarter chord per unit span is,
The equation of location of centre of pressure of the plate is,
Want to see more full solutions like this?
Chapter 1 Solutions
Fundamentals of Aerodynamics
Additional Engineering Textbook Solutions
Modern Database Management
Mechanics of Materials (10th Edition)
Database Concepts (8th Edition)
Electric Circuits. (11th Edition)
Vector Mechanics for Engineers: Statics and Dynamics
Fluid Mechanics: Fundamentals and Applications
- correct answer only. I will upvote.arrow_forwardCorrect answer only. I will upvote.arrow_forwardI really don't know how to approach this problem i've tried approaching it with some of the torsional stress equations I know but i'm comming up with awnsers that don't make any sence can you please help me with this?arrow_forward
- I tried this problem and don't know what I did wrong or how else I could approach it can you please help me out?arrow_forwardQ3: An engine produce 750 kW power and uses gaseous C12H26 as a fuel at 25 C; 200% theoretical air is used and air enters at 500 K. The products of combustion leave at 800 K. The heat loss from the engine is 175 kW. Determine the fuel consumption for complete combustion.arrow_forwardQu 5 Determine the carburizing time necessary to achieve a carbon concentration of 0.30 wt% at a position 4 mm into an iron carbon alloy that initially contains 0.10 wt% C. The surface concentration is to be maintained at 0.90 wt% C, and the treatment is to be conducted at 1100°C. Use the data for the diffusion of carbon into y-iron: Do = 2.3 x10-5 m2/s and Qd = 148,000 J/mol. Express your answer in hours to three significant figures. show all work step by step problems formula material sciencearrow_forward
- (Read Question)arrow_forwardIn figure A, the homogeneous rod of constant cross section is attached to unyielding supports. In figure B, a homogeneous bar with a cross-sectional area of 600 mm2 is attached to rigid supports. The bar carries the axial loads P1 = 20 kN and P2 = 60 kN, as shown.1. In figure A, derive the expression that calculates the reaction R1 in terms of P, and the given dimensions.2. In figure B, calculate the reaction (kN) at A.3. In figure B, calculate the maximum axial stress (MPa) in the rod.arrow_forward(Read image)arrow_forward
- (Read Image)arrow_forwardM16x2 grade 8.8 bolts No. 25 C1- Q.2. The figure is a cross section of a grade 25 cast-iron pressure vessel. A total of N, M16x2.0 grade 8.8 bolts are to be used to resist a separating force of 160 kN. (a) Determine ks, km, and C. (b) Find the number of bolts required for a load factor of 2 where the bolts may be reused when the joint 19 mm is taken apart. (c) with the number of bolts obtained in (b), determine the realized load factor for overload, the yielding factor of safety, and the separation factor of safety. 19 mmarrow_forwardProblem4. The thin uniform disk of mass m = 1-kg and radius R = 0.1m spins about the bent shaft OG with the angular speed w2 = 20 rad/s. At the same time, the shaft rotates about the z-axis with the angular speed 001 = 10 rad/s. The angle between the bent portion of the shaft and the z-axis is ẞ = 35°. The mass of the shaft is negligible compared to the mass of the disk. a. Find the angular momentum of the disk with respect to point G, based on the axis orientation as shown. Include an MVD in your solution. b. Find the angular momentum of the disk with respect to point O, based on the axis orientation as shown. (Note: O is NOT the center of fixed-point rotation.) c. Find the kinetic energy of the assembly. z R R 002 2R x Answer: H = -0.046ĵ-0.040 kg-m²/sec Ho=-0.146-0.015 kg-m²/sec T 0.518 N-m =arrow_forward
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
