1. Engineering
  2. Mechanical Engineering
  3. 5 problem to appreciate why laminar flow is of minimal...

Question: 5 problem to appreciate why laminar flow is of minimal...

Question details

5. Problem: To appreciate why laminar flow is of minimal importance in many engineering applications, compute the percent of the vehicle over which laminar flow exists for the following situations. In each case, consider the boundary layer on a flat portion of the vehicle and assume transition occurs at a (very high) Reynolds number of Rea 5 10 (a) A 6-m automobile moving at 10 m/sec (v 1.51 105 m2/sec). (b) A 6-m automobile moving at 30 m/sec (1.51 10-5 m2/sec). (c) A small aircraft with a wing chord length of 2.5 m moving at 70 m/sec (v 1.56 10-5 m2/sec) (d) A Boeing 747 with a wing chord length of 9.15 m moving at 255 m/sec (4.00-10-5 m2/sec) Answer (a) 12.6%, (b) 4.2%, (c) 4.5%, (d) 0.9%

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution