Gas Turbine Blade Cooling Technology, Advances, and Challenges

Continuous advances in cooling technologies have become necessary since the engine thermal efficiency and power output increase significantly with an increase in the turbine inlet temperature. This study explains blade cooling techniques and discusses the related challenges and recent advances in this research field.
10th Ankara International Aerospace Conference, Ankara, Türkiye, 18 - 20 Eylül 2019


Aerothermodynamics of turbine blade trailing edge cooling
Tunçel, Tuğba; Kahveci, Harika Senem; Department of Aerospace Engineering (2018)
It is known that the thermal efficiency of gas turbines strongly depends on the turbine entry temperature of the working fluid. This has resulted in increased turbine working temperatures, and peak temperatures in advanced gas turbines have been well above maximum allowable metal temperatures for quite some time. For turbine blades to survive while operating beyond these material temperature limits, internal and external cooling techniques have been developed. Due to structural and aerodynamic restrictions,...
Cooling performance investigation of a two-pass rib-roughened channel
Kavas, İsa; Kurtuluş, Dilek Funda; Yasa, Tolga; Department of Aerospace Engineering (2015)
The performance of the modern aero-engines is highly dependent on the turbine inlet gas temperature. The higher temperature leads to more compact and efficient machines. Additionally, specific fuel consumption of the engine is decreased for the same thrust rating. However, the turbine inlet temperatures of the today’s engines are already beyond the material structural limits. Hence, the turbine section must be cooled down to acceptable levels. Various types of cooling methods are typically applied to the ga...
Numerical investigation of circulating fluidized bed riser hydrodynamics for concentrating solar thermal receiver applications
Bilyaz, Serhat; Tarı, İlker; Department of Mechanical Engineering (2015)
Various heat transfer fluids and thermal storage materials are considered for concentrating solar power systems to improve the storage capability of the system which compensates the fluctuating behavior of the solar resources. Solid particles can be a good alternative since they have high sensible heat capacity. In addition, they are cheap, environmentally benign and chemically and mechanically stable at high temperatures. In this thesis, hydrodynamics of circulating fluidized bed solar receiver was numeric...
The Influence of cooling configuration and tip geometry on gas turbine blade tip leakage flow and heat transfer
Sakaoğlu, Sergen; Kahveci, Harika Senem; Department of Aerospace Engineering (2019)
In gas turbine engines, an increase in the thermal efficiency and power output can be ensured by increasing the turbine inlet temperature. This causes the high-pressure turbine (HPT) blades to be exposed to extremely high temperatures that requires the introduction of cooling flow in order to keep the temperatures within the allowable material limits and to reduce the high thermal loads on the blade. However, cooling flow introduced around the blade tip region affects the blade tip leakage flow and blade tip he...
3 D Simulation of Convection in Asymmetrically Heated Turbine Blade Cooling Channels
Tarı, İlker (null; 2000-08-18)
One of the important challenges in gas turbine design is the cooling of the turbine blades due to high operating temperatures. A common approach to this problem is circulating a coolant or cool air in channels bored on the turbine blades. Usually, it is very difficult to perform experiments to obtain information about flow conditions and properties in these channels. I used a home-brewed 3-D spectral methods code to simulate the fluid flow in inclined coolant channels driven by natural as well as forced con...
Citation Formats
H. S. Kahveci, “Gas Turbine Blade Cooling Technology, Advances, and Challenges,” presented at the 10th Ankara International Aerospace Conference, Ankara, Türkiye, 18 - 20 Eylül 2019, Ankara, Türkiye, 2019, Accessed: 00, 2021. [Online]. Available: