The Wall Effect for Unsteady, Choked Supercavitating Flow,
Abstract
A linear theory for the two-dimensional supercavitating flow past a flat hydrofoil heaving and pitching with small amplitudes in a choked tunnel is developed using the acceleration potential. It is supposed that the streamlines of the cavity always spring from the leading and the trailing edges of the foil and that the foil is inclined at a small angle to the oncoming flow. Also the pressure in the cavity is assumed to be constant. Force and moment coefficients are calculated as functions of reduced frequency and the ratio of tunnel height to chord length. The pressure disturbances caused by the unsteady motion in a tunnel studied far upstream; these are seen to depend on the chord-tunnel height ratio and reduced frequency. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1971
- Accession Number
- AD0718816
Entities
People
- Jong H. Kim
Organizations
- California Institute of Technology