Length to diameter ratio and row number effects in short pin fin heat transfer
Abstract
The relative effects of pin length to diameter ratio and of pin row geometry on the heat transfer from pin fins, was determined. Array averaged heat transfer coefficients on pin and endwall surfaces were measured for two configurations of staggered arrays of short pin fins (length to diameter ratio of 4). One configuration contained eight streamwise rows of pins, while the other contained only four rows. Results showed that both the 8-row and the 4-row configurations for an L sub p/D of 4, exhibit higher heat transfer than in similar tests on shorter pin fns (L sub p/D of 1/2 and 2). It was also found that for this L sub p/D ratio, the array averaged heat transfer was slightly higher with eight rows of staggered pins than with only four rows.
- Publication:
-
Proposed for presentation at the 28th Ann. Intern. Gas Turbine Conf
- Pub Date:
- November 1982
- Bibcode:
- 1982gatu.conf...27B
- Keywords:
-
- Dimensions;
- Fins;
- Heat Transfer;
- Pins;
- Gas Turbines;
- Heat Transfer Coefficients;
- Ratios;
- Staggering;
- Fluid Mechanics and Heat Transfer