Consider the impact of compression of the air-fuel mixture onturbulence. Assume that an idealized turbulent eddy is representedby a gas disc 3 mm in diameter, d, and 0.5 mm thick,l, at atmospheric pressure and temperature. The disck isspinning around its axis at 1000 rpm. What is the rotational speedof the disk after it is adiabatically compressed to 25 atmpressure? The gas disc is compressed equally in both the radial andaxial direction; that is d1 / d2 =l1 / l2. Discuss the results in terms ofturbulence in engines.
