Low-speed wind tunnel with atmospheric air

Assignment Help Mechanical Engineering
Reference no: EM13701063

A fan that can provide air speeds up to 50 m/s is to be used in a low-speed wind tunnel with atmospheric air at 25°C. If one wishes to use the wind tunnel to study flat-plate boundary layer behaviour up to Reynolds numbers of Rex = 10^8 , what is the minimum plate length that should be used? At what distance from the leading edge would transition occur if the critical Reynolds number were Rex, c = 5x10^5?

Reference no: EM13701063

Questions Cloud

Compute the complex dynamic shear modulus : Binder Classification (Grading) What is the best possible PG grade of the asphalt whose results are shown in Table 4 below? Use Table 9.3 from M&Z at end of assignment to help.
Thermal energy reservoirs : Consider a Carnot heat engine and a refrigerator operating between the same two thermal energy reservoirs. If the thermal efficiency of the heat engine is 0.80, the COP of the refrigerator is?
Find number of independent dimensionless parameters : Pressurised tank drained through a smooth nozzle, area A m(dot) = m(dot)(del p ,h, row, A, g) Find: number of independent dimensionless parameters. obtain the parameters
Compute the force needed to completely submerge the object : Calculate the 2x4 Block's Weight, mass, density and Specific Weight. Express values in both metric and US units. Compute the force needed to completely submerge the object.
Low-speed wind tunnel with atmospheric air : A fan that can provide air speeds up to 50 m/s is to be used in a low-speed wind tunnel with atmospheric air at 25°C. If one wishes to use the wind tunnel to study flat-plate boundary layer behaviour up to Reynolds numbers of Rex = 10^8 , what is the..
Where the hydrodynamic boundary layers meet : Air at 20°C flows at 1 m/s between two parallel flat plates spaced 5 cm apart. Estimate the distance from the entrance where the hydrodynamic boundary layers meet.
What is the equation for the actual air temperature : An electric heater heats air. The temperature sensor has a time constant of 5 seconds. The air temperature output (in °C), as measured by the temperature probe is: T=200+cos(0.5t)
Force required to keep the cart moving at constant velocity : A 2 cm horizontal jet of water with a velocity of 15 m/s is spraying onto a vertical plate attached to a cart moving opposite the direction of the water jet at 8 m/s. Determine the force required to keep the cart moving at a constant velocity.
Distillery uses mechanical vapour re-compression : The wash still in a whisky distillery uses mechanical vapour re-compression as shown in the simplified diagram of the Figure shown below. The vapour from the still is at 80° C. Take a minimum temperature difference between the vapour leaving the stil..

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  A finite dt is a source of irreversibility

Q1) Heat transfer across a finite ΔT is a source of irreversibility. Why is this? Give 2 examples of other sources of irreversibility.

  Consider steady heat transfer through a 5m by 6m brick wall

consider steady heat transfer through a 5m by 6m brick wall of a house of thickness 30cm. on a day when the temperature

  For flow over a circular cylinder as shown below the

for flow over a circular cylinder as shown below the velocity outside of boundary layer can be estimated to beux 2 ug

  If the furnace is at 1200 degc and the surrounding room is

a 200 mm diameter sight window on the wall of a furnace is losing heat at a rate of 1500 w. if the furnace is at 1200

  A 50 kg crate resting on a flat smooth surface is acted

a 50 kg crate resting on a flat smooth surface is acted upon by a horizontal force that varies by the equation f1.5t

  What is the required impeller diameter ratio between the

a 20 mw radial flow hydraulic turbine is to be designed with a head of 70 m and a speed of 90 rpm. a geometrically

  An airplane flying at a speed of 180 mph at an altitude of

an airplane flying at a speed of 180 mph at an altitude of 40ft drops a large package at point a. the package has a

  If the pu was in the shape of a cylinder with equal

the atomic bomb dropped on nagasaki in 1945 used 14lbm of plutonium pu that was in a subcritical state meaning it would

  Where are the respective reference points of particles

Two particles A and B start from rest at the origin s=0 and move along a straight line such that a_A=(6t - 3) ft/s^2 and a_B=(12t^2 - 8) ft/s^2, where t is in seconds. Where are the respective reference points of particles A and B? What are the direc..

  A 3084-kg steel projectile is fired from a gun at a

a 3.084-kg steel projectile is fired from a gun. at a particular point in its trajectory it has a velocity of 300 ms an

  The local acceleration of gravity is 981 ms2 for the co2

gaseous co2 is contained in a vertical piston-cylinder assembly by a piston of mass 50 kg and having a face area of

  An especially violent lightning bolt has an average

an especially violent lightning bolt has an average current of 1.37 103 a lasting 0.125 s. how much charge is delivered

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd