Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
PRELIMINARY INVESTIGATIONS OF THE GAS PROPERTY EFFECTS ON THE COOLING PARAMETERS
Submission Author:
Janaina Ferreira da Silva , SP
Co-Authors:
Janaina Ferreira da Silva, Ana Adalgiza Garcia Maia, Cleverson Bringhenti, Jesuino Takachi Tomita
Presenter: Janaina Ferreira da Silva
doi://10.26678/ABCM.COBEM2019.COB2019-0402
Abstract
Substantial performance improvements might be achieved by increasing Turbine Inlet Temperature (TIT). However, this raises the heat load in turbine components requiring cooling to ensure safe operation and satisfy the performance and service time requirements. Many factors influence the required cooling airflow, such as the coolant and gas properties. Since some industrial engines may operate using more than one fuel type, it is of interest to investigate the effects of change the gas composition on the cooling parameters. In the present work, an in-house code estimates the cooling air parameters using the method described by Consonni. The fluid property calculation applies the two-component model. The fuels considered are kerosene (Jet-A); diesel; natural gas (pure methane); and, residual oil. Results showed a marked effect of the specific heat ratio cpc/cpg (i.e. air to gas ratio) on the coolant air fraction for the primary fuels, while other gas properties might become significant for non-conventional coolant and working fluid. The results highlight the importance of a detailed investigation of gas property effects on turbine cooling parameters.
Keywords
Gas Turbine, Turbine, Blade cooling, Flow properties, fuel
