... Abstract Current scenarios towards net zero emission assume an increasing demand for peaking operation of installed and new heavy-duty gas turbines for power generation, resulting in raising targets for transient behaviors of gas turbine rotors. During the design development process cyclic...

... Abstract The present paper focuses on the numerical investigation of the transient response of a rotorshaft affected by unilateral contact occurrences with friction mechanisms. Rotor-stator contact is initiated radially at the shaft level. The components are modeled under the rigid bodies...

... Abstract In this paper the study of an axial turbine with a supersonic rotor has been performed for a full stage turbine. The state-of-the art supersonic stages include supersonic stators that create shock waves that enter the rotor stage disturbing the flow. The current study proposes a semi...

... Aachen, Germany ABSTRACT In future, component requirements of blade integrated disks (Blisk) / integrally bladed rotors (IBR) as well as turbine and compressor discs will become more challenging as today exhibiting more complex and downsized geometries, tighter tolerances and are made of more difficult...

...) that identifies expected results based on manufacturing/microstructure information as well as a second-tier rule incorporating NDE for a more refined HCF Acceptance criteria. additive manufacturing repair rotor airfoil NDE titanium turbine engines Proceedings of ASME Turbo Expo 2022 Turbomachinery...

... Abstract We present a probabilistic model for quantifying the number of load cycles for nucleation of forging flaws — for a 3.5NiCrMoV high strength low alloy rotor steel — into a crack under gas turbine operating conditions. The model correlates low cycle fatigue data, ultrasonic testing...

... repair techniques. additive manufacturing additive repair rotor airfoil titanium turbine engines Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-59480 ESTABLISHING AN ACCEPTANCE CRITERIA FOR ASSESSING...

...EFFECT OF MATCHING PARAMETERS BETWEEN ROTOR AND DIFFUSER ON THE FLOW LOSS CHARACTERISTIC IN AN AXIAL TURBINE Xing Wang1,2, Yangli Zhu1,2,3, Wen Li1,2,3, Xuehui Zhang 1,2,3*, Haisheng Chen1,2,3 I Institute of Engineering Thermophysics, Chinese Academy of Sciences, 11 Beisihuanxi Rd, Haidian District...

... from heavy duty steel rotor disks for the energy sector. The large disks, including ultrasonic indications on the millimeter scale, were cut into smaller segments in order to efficiently machine specimens including manufacturing related forging flaws. We conducted cyclic loading experiments...

... Abstract Considerable steps to assess the structural capability of laser directed energy deposition (DED) aim to determine the viability of repair processes for integrally bladed rotors (IBRs). Two laser DED processes are under investigation in this study: wire fed and blown powder feedstock...

... limiting the engine life is the compressor rotor. The cyclic life of the rotor depends on many factors: the stress-strain state in critical zones, the life of the material under low-cycle loading, the regime of engine operation, production deviations (within tolerances), etc. In order to verify...

... caused by the impact of an aero-engine fan blade is studied. Because the compressor guide vane has a small solidity, the hail may not only hit the vane when striking the blade, but also may hit the first-stage rotor blade. The effects of hail impact on the vanes and rotor blades, especially the impact...

... 07 05 2012 An experimental study is carried out in a stationary linear cascade which simulates a turbine rotor to compare the thermal performance of two new axisymmetric endwall contour geometries. Measurements of endwall adiabatic film cooling effectiveness and near-endwall passage...

... is identified accurately even in the case of less number of measured vibrations. The method is applied for crack identification in a centrifugal pump rotor using transverse vibrations. The results presented are obtained purely from FEM simulations. Model based method rotor crack Proceedings of ASME...

..., and the computational time is saved. This method is suitable for on-line monitoring the gradual changes of unbalance on rotating machines; especially those required fixedly operating speeds. fault unbalance monitoring rotor Proceedings of ASME Turbo Expo 2009: Power for Land, Sea and Air GT2009 June 8-12...

... 04 08 2009 The tandem airfoil has potential to do more work as a compressor blade than a single airfoil without incurring higher losses. The goal of this work is to evaluate the fluid mechanics of a tandem rotor in the rear stages of a core compressor. As such, the results...

... mainstreams. Although film cooling is very effective, it is well known that film cooling could reduce the engine power rating and introduce losses, mainly due to the direct coolant/mainstream interactions. In this paper, a preliminary study of a new closed-loop rotor cooling technique is reported. Filled...