Question
In: Mechanical Engineering
Consider the impact of compression of the air-fuel mixture on turbulence. Assume that an idealized turbulent...
Consider the impact of compression of the air-fuel mixture on turbulence. Assume that an idealized turbulent eddy is represented by a gas disc 3 mm in diameter, d, and 0.5 mm thick, l, at atmospheric pressure and temperature. The disck is spinning around its axis at 1000 rpm. What is the rotational speed of the disk after it is adiabatically compressed to 25 atm pressure? The gas disc is compressed equally in both the radial and axial direction; that is d1 / d2 = l1 / l2. Discuss the results in terms of turbulence in engines.
Solutions
samet mamat answered 2 years agoRelated Solutions
(a) What is the best air/fuel ratio for an automobile engine? (b) If the mixture is...
(a) What is the best air/fuel ratio for an automobile engine?
(b) If the mixture is made leaner, what happens to the hydrocarbon
emissions? (c) If the fuel mixture is richer, how does this affect
NOx emissions
During the power stroke of an internal combustion engine, the air-fuel mixture is ignited and the...
During the power stroke of an internal combustion
engine, the air-fuel mixture is ignited and the expanding hot gases
push on the piston. Fuel efficiency is maximized in this process
when the ignited gas is as hot as possible, the gas expands
allowing a maximum amount of work to be done, and cooled exhaust
gas is released at the end of the cycle. Assuming the engine
exhibits the highest efficiency possible, which of the following
statements concerning the exhaust gas...
An air–fuel mixture enters a constant area combustion chamber at a velocity of 100 m/s a...
An air–fuel mixture enters a constant area combustion chamber at
a velocity of 100 m/s a pressure of 70 kPa and a temperature of
150°C. Assuming that the fuel–air ratio is 0.04, the heating value
of the fuel is 30 MJ/kg, and the mixture has the properties of air,
calculate the Mach number in the gas flow after combustion is
completed and the change of stagnation temperature and stagnation
pressure across the combustion chamber. Neglect the effects of
viscosity and...
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