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RISEffect of Surface Roughness and Inlet Turbulence Intensity on a Turbine Nozzle Guide Vane External Heat Transfer: Experimental Investigation on a Literature Test Case
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Surface roughness is well known to significantly influence turbine aerodynamics and heat transfer; different studies have been undertaken in the last decades, in order to precisely characterize its effects and pursue a ...
Development and Application of an Internal Heat Transfer Measurement Technique for Cooled Real Engine Components1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The aim of this work is to present the development and application of a measurement technique that allows to record internal heat transfer features of real components. In order to apply this method, based on similar ...
Analysis of Swirl Number Effects on Effusion Flow Behavior Using Time-Resolved Particle Image Velocimetry
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The analysis of the interaction between the swirling and cooling flows, promoted by the liner film cooling system, is a fundamental task for the design of turbine combustion chambers since it influences different aspects ...
Experimental Investigation of the Flow Field and the Heat Transfer on a Scaled Cooled Combustor Liner With Realistic Swirling Flow Generated by a Lean Burn Injection System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Leanburn swirl stabilized combustors represent the key technology to reduce NOx emissions in modern aircraft engines. The high amount of air admitted through a leanburn injection system is characterized by very complex ...
Experimental and Theoretical Investigation of Thermal Effectiveness in Multiperforated Plates for Combustor Liner Effusion Cooling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Stateoftheart liner cooling technology for modern combustors is represented by effusion cooling (or fullcoverage film cooling). Effusion is a very efficient cooling strategy based on the use of multiperforated liners, where ...
Effect of Slot Injection and Effusion Array on the Liner Heat Transfer Coefficient of a Scaled Lean Burn Combustor With Representative Swirling Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: International standards regarding polluting emissions from civil aircraft engines are becoming gradually even more stringent. Nowadays, the most prominent way to meet the target of reducing NOx emissions in modern aeroengine ...
Adiabatic Effectiveness on High-Pressure Turbine Nozzle Guide Vanes Under Realistic Swirling Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In modern lean-burn aero-engine combustors, highly swirling flow structures are adopted to control the fuel-air mixing and to provide the correct flame stabilization mechanisms. Aggressive swirl fields and high turbulence ...
Flow Field and Hot Streak Migration Through a High Pressure Cooled Vanes With Representative Lean Burn Combustor Outflow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Modern lean burn aero-engine combustors make use of relevant swirl degrees for flame stabilization. Moreover, important temperature distortions are generated, in tangential and radial directions, due to discrete fuel ...
Heat Transfer Coefficient and Adiabatic Wall Temperature Measurements on High-Pressure Turbine Nozzle Guide Vanes With Representative Inlet Swirl and Temperature Distortions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Combustor exit conditions in modern gas turbines are generally characterized by significant temperature distortions and swirl degree, which in turn is responsible for very high turbulence intensities. These distortions ...
Experimental Analysis of Additively Manufactured Latticework Coupons
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The capabilities and the precision of additive manufacturing processes have been tremendously increased in the last years, and this trend is not expected to be close to an end. Researchers, in the gas turbine industry, are ...