Session: 35-04 Whole Engine Aero and Aero-Thermal Methods

Paper Number: 100945

100945 - Investigations of Turbine Aero-Thermal Characteristics With Air Cooling and Sealing System 

This study investigates the rim sealing method for small gas turbine engine (GTE) by providing coolant air into the cavity between the stator and the adjacent rotor. This method is used mainly to prevent hot gases from mainstream entering the cavity, thus prevent damages due to overheat. It can be applied for small GTE due to its simple in design, cheap and controllable. However, it comes to a penalty that it creates a secondary flow mixing with the mainstream that generates loss in shaft power. Hence, it is significant for the designers to estimate the engine performance while considering the air sealing and cooling system to ensure the minimization of power loss and the cavity is sealed. In this study, the Aero-thermal prediction model based on CFD method is proposed to investigate the behaviors of small GTE while considering the cooling and sealing system. The aero-thermal model based on CFD is performed and validated with two generic small GTEs test data at the different RPM for the mass flow, shaft power and the temperature after turbine stage. The aero-thermal model is calibrated and presented for predicting the turbine aero-thermal characteristics while considering the simple air-cooling and sealing system. The outcomes show the characteristics and effects of the sealant air to the overall performance of the GTE, which includes thermal efficiency, change of shaft power and sealing effectiveness.

Key words: Gas Turbine Engine (GTE), Air cooling, Air sealing, CFD, Engine test data

Presenting Author: Nhu-Van Nguyen Viettel Aerospace Institute, Viettel Group

Presenting Author Biography: - He is currently working as a Principle Investigator (PI) and Expert at Viettel Aerospace Institute, Viettel Group, Hanoi Vietnam
- He completed the Doctorate degree on 8.2011 in Aerospace Engineering Department, Konkuk University, Seoul, South Korea
- He has strong background academics with publications on AIAA Journal of Aircraft, AIAA Rocket and propulsion journal, SAGE, Aerospace Science and Technology (AST), Elsevier etc...
- He experiences in aerospace industries for the aircraft/UAV development in South Korea and Vietnam
- He had been an Assistant Professor, Aerospace Engineering Department, Konkuk University for 1.5 years

Authors:

Quoc-Huy Nghiem Viettel Aerospace Institute, Viettel Group
Nhu-Van Nguyen Viettel Aerospace Institute, Viettel Group
Xuan-Hung Vu Viettel Aerospace Institute
Phi-Minh Nguyen Viettel Aerospace Institute