Drop Breakup by Airstream Impact
Abstract
The effects of an impulsively applied airstream on the breakup of a water droplet are examined analytically and experimentally. Scaling laws for droplet breakup are derived in which the time to diminish a droplet to a critical size is related to the impact pressure, q2. The drop breakup relation is obtained, tb/d = k/q2 to the 1/2 power, where the value of the constant k is to be determined from experiment. This relationship is valid when the value of the Weber number is much larger than one. A shocktube experiment is described in which detailed photographs of drop motion and breakup are obtained with a high speed framing camera. Drop displacement and breakup data are obtained over a range of shock front Mach number from 1.85 to 2.84; simultaneously impact pressure is varied from 2.67 to 28.4 psi. The value of the drop breakup constant is determined to be, K = 23.9 ms-psi to the 1/2 power/in.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1968
- Accession Number
- AD0666525
Entities
People
- James E. Nicholson