Effect of Multiple Ribs and Tip Injection on the Aerothermal Characteristics of the Squealer Tip in Turbine Stage

•The effects of rib layout inside the tip cavity and tip injection configurations on aerothermal features were investigated.•The averaged heat transfer coefficient of tip with 3 ribs decreases by 19.55%, compared the conventional squealer tip.•To reduce heat transfer and aerodynamic loss, optimizing rib layout and tip injection configurations is a practical solution.