You want to test the aerodynamics of a new arquitectural design by building a model and...
You want to test the aerodynamics of a new arquitectural design by building a model and putting it inside a wind tunnel. The actual building will be 37.0 m tall and subjected to wind speeds of 11 m/s. If the model is 2.1 m tall, what should be the speed in the wind tunnel to accurately model the winds around the building?
Homework Answers
It is based on bernoulli's as explained below.
Add Answer to:
You want to test the aerodynamics of a new arquitectural design
by building a model and...
The aerodynamic drag of a new sports car is to be predicted at a speed of 75 km/h at an air temperature of 25°C. Automot...
The aerodynamic drag of a new sports car is to be predicted at a speed of 75 km/h at an air temperature of 25°C. Automotive engineers build a one-fifth scale model of the car to test in a wind tunnel. It is winter and the wind tunnel is located in an unheated building. The temperature of the wind tunnel air is only 5°C. a) Determine how fast the engineers should run the wind tunnel in order to achieve similarity between...
You are to conduct a wind tunnel testing of a new football design. It is known...
You are to conduct a wind tunnel testing of a new football design. It is known that you need to maintain Reynold’s number, Re, and Strovhal Number, St, similarity for the testing. Based on a standard college quarterback, prototype velocity, V = 40mph and rotation, ω = 300rpm. The prototype football has a diameter of D=7inches. Due to instrumentation requirements, the model used in the wind tunnel must be twice as big as the prototype. Dmodel=14inches. a) Determine the required...
Problem 7-C: The aerodynamic drag of a new sports car is to be predicted at a...
Problem 7-C: The aerodynamic drag of a new sports car is to be predicted at a speed of 70.0 mi/h at an air temperature of 25°C. Automotive engineers build a one-fourth scale model of the car to test in a wind tunnel. The temperature of the wind tunnel air is also 25°C. The drag force is measured with a drag balance, and the moving belt is used to simulate the moving ground (from the car's frame of reference) Determine how...
EXAMPLE 7-8 Lift on a Wing Some aeronautical engineers are designing an airplane and wish to...
EXAMPLE 7-8 Lift on a Wing Some aeronautical engineers are designing an airplane and wish to predict the lift produced by their new wing design (Fig. 7-31). The chord length L of the wing is 1.12 m, and its planform area A (area viewed from the top when the wing is at zero angle of attack) is 10.7 m2. The prototype is to fly at V = 52.0 m/s close to the ground where T = 25°C. They build a...
6. (3 pts.) A long submerged support leg of a bridge will experience vortex shedding when a river...
6. (3 pts.) A long submerged support leg of a bridge will experience vortex shedding when a river current flows past it. These vortices can create damaging periodic forces so you want to do a scale model test in a water tunnel as part of the initial bridge design. A dimensional analysis on this phenomenon reveals the following Pi terms: where ω shedding frequency, V-fluid velocity, p-fluid density,μ fluid viscosity and D and H are as shown. For the specific...
1. Consider a design of a low-speed open-circuit subsonic wind tunnel. The goal is to achieve...
1. Consider a design of a low-speed open-circuit subsonic wind tunnel. The goal is to achieve a free stream velocity of 150 m/s at the test section of this tunnel. This wind tunnel is equipped with a U-tube mercury manometer that measures the pressure difference between the inlet (the settling chamber) and the test section. If the fan of the wind tunnel is able to generate the maximum pressure difference corresponding to a height difference of 10 cm on the...
After calibrating a test anemometer against a standard in a wind tunnel, you obtain the following...
After calibrating a test anemometer against a standard in a wind tunnel, you obtain the following mathematical function that relates the test anemometer wind speed values, Va, to the "true" standard wind speed, Vs: เสี Vs AVaB, where A 1.02 0.03 and B 0.3t 0.1 ms1. By examining the standard deviation of Va at several different wind speeds you also estimate any individual Va value has an uncertainty of 0.3 ms 1. The mean measured wind speed, Vawas 3 m/s....
Chapter 2: Dimensional Analysis Exercise!l 2019 1. Amirul Asyraf's team is to design a human-powe...
how to do this?
Chapter 2: Dimensional Analysis Exercise!l 2019 1. Amirul Asyraf's team is to design a human-powered submarine for a design competition The overall length of the prototype submarine is 2.24 m, and its student designers hope that it can travel fully submerged through water at 0.560 m/s, The water is freshwater (a lake) at T-15°C. The design team builds a one-eighth scale model to test in ther university's wind tunnel. A shield surrounds the drag balance strut...
The owner of a small office building asked you to design the new air conditioning system...
The owner of a small office building asked you to design the new air conditioning system for the building. The system cools the air supplied to the offices using a chiller (cold water refrigeration system). The water requirement for the evaporator in each floor is 18.2 mh. The velocity within the pipe must remain between 1.5 m/s and 2.5 m/s, to ensure the appropriate heat exchange process in the evaporators and minimize the noise. The material of the pipe is...
3. So you want to be an astronaut. There is a new "test" that all must...
3. So you want to be an astronaut. There is a new "test" that all must go through call the vertical circle of death (well at least that is what we will call it). On this "ride" you (m-76kg) are spun in a 18m diameter vertical circle once every 2.0s. a) what is your angular speed? b) what is the magnitude of your centripetal acceleration? c) what is your apparent weight at the top and the bottom of the ride?
Problem 7-C: The aerodynamic drag of a new sports car is to be predicted at a speed of 70.0 mi/h at an air temperature of 25°C. Automotive engineers build a one-fourth scale model of the car to test in a wind tunnel. The temperature of the wind tunnel air is also 25°C. The drag force is measured with a drag balance, and the moving belt is used to simulate the moving ground (from the car's frame of reference) Determine how...
EXAMPLE 7-8 Lift on a Wing Some aeronautical engineers are designing an airplane and wish to predict the lift produced by their new wing design (Fig. 7-31). The chord length L of the wing is 1.12 m, and its planform area A (area viewed from the top when the wing is at zero angle of attack) is 10.7 m2. The prototype is to fly at V = 52.0 m/s close to the ground where T = 25°C. They build a...
6. (3 pts.) A long submerged support leg of a bridge will experience vortex shedding when a river current flows past it. These vortices can create damaging periodic forces so you want to do a scale model test in a water tunnel as part of the initial bridge design. A dimensional analysis on this phenomenon reveals the following Pi terms: where ω shedding frequency, V-fluid velocity, p-fluid density,μ fluid viscosity and D and H are as shown. For the specific...
1. Consider a design of a low-speed open-circuit subsonic wind tunnel. The goal is to achieve a free stream velocity of 150 m/s at the test section of this tunnel. This wind tunnel is equipped with a U-tube mercury manometer that measures the pressure difference between the inlet (the settling chamber) and the test section. If the fan of the wind tunnel is able to generate the maximum pressure difference corresponding to a height difference of 10 cm on the...
After calibrating a test anemometer against a standard in a wind tunnel, you obtain the following mathematical function that relates the test anemometer wind speed values, Va, to the "true" standard wind speed, Vs: เสี Vs AVaB, where A 1.02 0.03 and B 0.3t 0.1 ms1. By examining the standard deviation of Va at several different wind speeds you also estimate any individual Va value has an uncertainty of 0.3 ms 1. The mean measured wind speed, Vawas 3 m/s....
how to do this?
Chapter 2: Dimensional Analysis Exercise!l 2019 1. Amirul Asyraf's team is to design a human-powered submarine for a design competition The overall length of the prototype submarine is 2.24 m, and its student designers hope that it can travel fully submerged through water at 0.560 m/s, The water is freshwater (a lake) at T-15°C. The design team builds a one-eighth scale model to test in ther university's wind tunnel. A shield surrounds the drag balance strut...
The owner of a small office building asked you to design the new air conditioning system for the building. The system cools the air supplied to the offices using a chiller (cold water refrigeration system). The water requirement for the evaporator in each floor is 18.2 mh. The velocity within the pipe must remain between 1.5 m/s and 2.5 m/s, to ensure the appropriate heat exchange process in the evaporators and minimize the noise. The material of the pipe is...
3. So you want to be an astronaut. There is a new "test" that all must go through call the vertical circle of death (well at least that is what we will call it). On this "ride" you (m-76kg) are spun in a 18m diameter vertical circle once every 2.0s. a) what is your angular speed? b) what is the magnitude of your centripetal acceleration? c) what is your apparent weight at the top and the bottom of the ride?
Most questions answered within 3 hours.
-
write a program that finds the number of zeros in an 8-bit data
item using assembly...
asked 3 minutes ago -
Suppose car models A, B, and C are popular among drivers.
Suppose 12% of the drivers...
asked 3 minutes ago -
Which statement is always true: The total energy of a closed
system...
A) is always equally...
asked 17 minutes ago -
find the critical value associated with a right sided hypothesis of
the mean using a sample...
asked 2 hours ago -
Which of the following statements is true with respect to a
simple linear regression model?
a....
asked 3 hours ago -
The energy required to remove an electron from a surface of a
solid element is called...
asked 4 hours ago -
How would you train your employees to avoid risks of using
mobile devices?
asked 4 hours ago -
Assume Kw = 1.01 ✕ 10−14
For pure water, we can calculate [H3O+ ] = [OH...
asked 5 hours ago -
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 6 hours ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 7 hours ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 8 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 8 hours ago