A study of heat transfer coefficients on cylindrical pipe in turbulent flow

This thesis represents a study of the effects of turbulent motion on heat transfer coefficients on cylindrical pipe. The turbulent motion was created by cutting transverse slots in a spiral configuration along the pipe length. An induction heater was used for the heat source and water as the cooling medium. The water was conducted over the pipe surface and through the slots. This caused the laminar layer along the pipe surface to be broken up and an increase in the heat transfer coefficient was experienced. The main objective of this test was to find if a relation existed between the heat transfer coefficient, pipe diameter, and the distance between the transverse slots. A ratio of the distance between the slots to the pipe diameter was used in determining the configurations to be used for the test. It was found as the distance between the slots, or the ratio, increased the heat transfer coefficient decreased and approached the value of the heat transfer coefficient of a solid pipe --Abstract, page 2