Accession Number : ADA257855


Title :   Numerical Analysis of the Flow in a Turbulated Rectangular Duct Simulating the Cooling Passages in a Turbine Blade


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Palatka, Robert M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a257855.pdf


Report Date : 15 Jun 1992


Pagination or Media Count : 93


Abstract : An extensive review of the literature revealed that many experimental studies have been conducted in heat-transfer wind tunnels simulating the cooling passages in turbine blades. However, very few numerical studies have been performed. Phoenics, a computational fluid dynamics computer program, produced results for several duct configurations and calculated the heat transfer characteristics of each. The configurations investigated included a straight, square duct and a rectangular duct with turbulators, (a form of turbulence promoters) present. The parameters varied included Reynolds numbers, turbulence intensity and grid geometry. Results for the turbulated duct indicated highly distinct and repeatable flow patterns developed over a wide range of values. The variation of the inlet turbulence intensity had little impact on the kinetic energy. The results proved to be highly grid dependent, which greatly impacted the correlation between experimentally and numerically produced data, for the same configurations, under similar operating parameters. Turbulator, Computational fluid dynamics, Heat transfer, Grid, Duct.


Descriptors :   *AIR FLOW , *NUMERICAL ANALYSIS , *COOLING , *AIRCRAFT ENGINE DUCTS , *TWO DIMENSIONAL FLOW , *TURBINE BLADES , HEAT TRANSFER , COMPUTER PROGRAMS , COMPUTATIONS , IMPACT , AIRCRAFT ENGINES , INTENSITY , BLADES , FLUIDS , GEOMETRY , PATTERNS , KINETIC ENERGY , DUCTS , CONFIGURATIONS , CORRELATION , VARIATIONS , TUNNELS , WIND TUNNELS , INLETS , FILM COOLING , NUMBERS , FLUID DYNAMICS , HEAT , TRANSFER , VALUE , KINETICS , FLOW , TURBINES , TURBULENCE , WIND , COMPUTERS , DYNAMICS , PARAMETERS , ENERGY , GRIDS


Subject Categories : Aircraft
      Numerical Mathematics
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE