Accession Number : ADA150774


Title :   Fluid Mechanics and Heat Transfer Spirally Fluted Tubing.


Descriptive Note : Final rept.,


Corporate Author : GA TECHNOLOGIES INC SAN DIEGO CA


Personal Author(s) : Yampolsky,J S ; Libby,P A ; Launder,B E ; LaRue,J C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a150774.pdf


Report Date : Dec 1984


Pagination or Media Count : 370


Abstract : The objective of this program is to develop an understanding of the fluid mechanics and heat transfer mechanisms that result in the demonstrated performance of the spiral fluted tubing under development at GA Technologies Inc. Particularly emphasized are the processes that result in the augmentation of the heat transfer coefficient without an increase in friction coefficient in the single-phase flow. Quantitative delineation of these processes would allow for their application to the optimal solution of heat transfer problems in general was well as to tubular heat exchanges using spiral fluted tubes. The experimental phase of the program consisted of the following: 1. Flow visualization studies using high-speed photography of dye injected into water flowing in a cast acrylic spiral fluted tube. 2. Time-resolved axial velocity measurements as a function of radius at the exit plane of a spiral fluted tube with water flowing through the tube. 3. Simultaneous time-resolved measurements of the axial and radial velocity components and temperature with heated air flowing through the tube cooled by a water jacket.


Descriptors :   *HEAT TRANSFER , *FLUID MECHANICS , *TUBES , WATER , FLOW VISUALIZATION , COEFFICIENTS , TUBULAR STRUCTURES , DYES , SYNCHRONISM , FRICTION , AXIAL FLOW , HEAT TRANSFER COEFFICIENTS , HIGH SPEED PHOTOGRAPHY , RADIAL VELOCITY


Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE