UNSTEADY-STATE CONVECTIVE HEAT EXCHANGE AND HYDRODYNAMICS IN CHANNELS,
Abstract
The report reviews previously published theoretical and experimental studies treating nonsteady-state heat transfer and hydrodynamics in channels. On the basis of the review the following conclusions are drawn: (1) The flow pattern during detached and attached flow in channels differs from the quasisteady-state pattern. This can result in a significant deviation of the heat transfer and hydraulic resistance from the quasisteady-state calculations. (2) In steady-state hydrodynamics and thermal nonsteady-state conditions, the heat transfer can differ from quasisteady-state values as a result of the nonsteady-state thermal conductivity. (3) The published theoretical investigations are qualitative and are presented in approximations. The theoretical investigation presents very complex mathematical problems. (4) Experimental studies of nonsteady-state hydrodynamics and heat transfer in channels are still in the initial stages of investigation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 20, 1969
- Accession Number
- AD0687056
Entities
People
- E. K. Kalinin
Organizations
- National Air and Space Intelligence Center