On Slugs and Puffs in Transitional Pipe Flow.
Abstract
Conditionally sampled hot-wire measurements were taken in a pipe at Reynolds numbers corresponding to the onset of turbulence. The pipe was smooth and carefully aligned so that turbulent slugs appeared naturally at a Reynolds number greater than 50,000. Transition could be initiated at lower Reynolds numbers by introducing disturbances into the inlet. For slightly disturbed inlet, turbulent slugs were observed which occupied the entire cross section of the pipe, growing in length as they proceed downstream. When a large distrubance was introduced into the inlet, the turbulent regions which were convected downstream were designated as puffs. Results of the study are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1972
- Accession Number
- AD0737524
Entities
People
- F. H. Champagne
- I. J. Wygnanski
Organizations
- Boeing