Engineering, 21.05.2020 01:58 katswindle11
The drag characteristics of an airplane are to be determined by model tests in a wind tunnel operated at an absolute pressure of 1300 kPa. If the prototype is to cruise in standard air at 433 km/hr, and the corresponding speed of the model is not to differ by more than 26% from this (so that compressibility effects may be ignored), what range of length scales may be used if Reynolds number similarity is to be maintained? Assume the viscosity of air is unaffected by pressure, and the temperature of air in the tunnel is equal to the temperature of the air in which the airplane will fly. Find (a) the minimum and (b) the maximum lm/l.
Answers: 2
Another question on Engineering
Engineering, 04.07.2019 18:10
Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise
Answers: 3
Engineering, 04.07.2019 18:10
Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?
Answers: 3
Engineering, 04.07.2019 18:10
Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.
Answers: 3
Engineering, 04.07.2019 18:10
Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.
Answers: 2
You know the right answer?
The drag characteristics of an airplane are to be determined by model tests in a wind tunnel operate...
Questions
Physics, 08.07.2020 20:01
Health, 08.07.2020 20:01
Mathematics, 08.07.2020 20:01
Mathematics, 08.07.2020 20:01
Computers and Technology, 08.07.2020 20:01
