Experimental Investigation And Analysis Of Heat Transfer In Rectangular Channel With Elongated Hole

Abstract

Gas turbine vanes and blades are exposed to high air temperature. And increasing turbine rotor inlet temperature directly leads to a rise in thermal efficiency and output power of gas turbines. The rotor inlet temperature is far higher than the melting point of the blade and vane material. Hence, cooling technology of turbine blades has become one of the most important key factors for improvement of gas turbine engine efficiency.

In this thesis, a model of rectangular channel with blockage will be designed and fabricated. The rectangular channel has a width-to-height ratio of 11:1. The blockages will be subdivided into two different cases using two different aspect ratios (hole-width-to-height ratio) which are determined by the number of holes with four and six holes per blockage. Experiments are conducted to determine the heat transfer. CFD analysis will be done to validate with that of experimental data.