In: Mechanical Engineering
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.