HEAT TRANSFER IN WAKES,
Abstract
This work concerns tt transfer from and drag on a flat plate when it is placed in the wake of an identical flat plate. Each plate is at a constant but not necessarily equal temperature. The analytical development con siders the case of two collinear zero thickness plates aligned with a steady, incompressible, laminar flow, and assumes that the boundary layer equations apply throughout. The experimental work includes heat transfer measurements, temperature and velocity (hot wire) probing of the wake behind the first plate, vortex shedding frequency measurements, and flow visualization in a water table. Three pairs of plates of varying thickness are used. The ''thin'' pair is sharpened at leading and trailing edges while the thicker pairs are rectangular in cross section. Of the results of this study, those of main interest to the heat exchanger designer are: that the second plate models fairly well the ''average fin'' of a strip-fin heat exchanger surface; that (based on the criterion of desira bility of least pumping power per unit heat transfer rate) there is an optimum in fin thickness; and that care must be used in interpreting heat transfer data in the range of possibly stable vortex shedding. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 1963
- Accession Number
- AD0413126
Entities
People
- D.b. Adarkar
- W.m. Kays
Organizations
- Stanford University