Forced convection heat transfer from pin fin arrays
Extended surfaces in the form of fins are widely used to enhance heat dissipation from a surface. A review of the literature revealed that there exists considerable experience in experimental and numerical analysis for retangular fins, but there is a scarcity of information on pin fins. This dissertation presents the findings of a comprehensive literature search on the state-of-the-art of pin fins, detailed experimental investigation of forced convection heat transfer from pin fin arrays involving complex flow fields that are caused by orientation of the find arrays at various angle of inclination an fin tip clearances, and a simplified numerical analysis. An experimental investigation was conducted to study the forced convection/radiation heat transfer characteristics of three staggered and in-line pin fin arrays that had different fin diameter in interfin spacing ratios. The experiments were performed for two tip clearances, four to seven heat inputs to the array baseplate, two or three flow rates, two fin orientations and five different angles of natural convection experiments were performed on one of the arrays. The combined mode rate of heat transfer was measured and the contribution of the radiation heat transfer was determined analytically. The flow field was studied through flow visualization, velocity and pressure measurements. The heat transfer results were used to establish an empirical correlation to evaluate and predict the performance of pin fin arrays subjected to complex boundary conditions. A simplified numerical analysis was performed for an in-line fin array with simple boundary conditions.
- Research Organization:
- Massachusetts Univ., Amherst, MA (United States)
- OSTI ID:
- 6877963
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
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