... to quantify the geometrical impact on the mass loss, plastic deformation, wear pattern, contact forces, and frictional temperature variations in the chamfered labyrinth fins. The results show that the contact-separations and contact force fluctuations are generated in rubbing events, which significantly...

...Xin Yan; Xinbo Dai The wear behaviors of the rectangular labyrinth seal fin against high-speed rotor were experimentally investigated on the incursion test rig. The material losses, worn geometries, frictional temperature distributions, and contact forces of labyrinth fin in rubbing events were...

... labyrinth seals (i.e., with straight fins and chamfered fins) in rubbing events. With the existing experimental data, FEA methods for contacting simulations and CFD methods for leakage rate and flow pattern predictions are carefully examined. The wear characteristic and leakage performance between labyrinth...

... received May 10, 2018; final manuscript received May 10, 2018; published online July 9, 2018. Editor: David Wisler. 10 05 2018 10 05 2018 Engines Friction Internal combustion engines Wear Electroplated soft metal overlays were first applied to copper-based engine bearing...

... Wear In mechanical engineering devices, such as turbines or compressors, whose working principle is based on the transfer of energy between a high-speed rotor and a fluid, the rotor is supported on bearings and annular seals. Bearings and seals have different technological purposes (sealing...

... Nonintrusive diagnostics Sprays Two-phase Visualization Wear The change in energy production from fossil fuels to renewable sources results in a fluctuation of the produced electric energy. To ensure grid stability, a higher flexibility of conventional power plants is getting more and more...

... manuscript received November 8, 2017; published online April 20, 2018. Editor: David Wisler. 19 10 2017 08 11 2017 Film Friction Internal combustion engines Measurement techniques Wear Today, engines are being downsized and firing pressures are increased to meet future fuel...

.... , and Gola , M. M. , 2016 , “ Pre-Optimization of Asymmetrical Underplatform Dampers ,” ASME J. Eng. Gas Turbines Power , 139 ( 1 ), p. 012504 . 10.1115/1.4034191 [20] Lavella , M. , 2016 , “ Contact Properties and Wear Behaviour of Nickel Based Superalloy René 80 ,” Metals , 6 ( 7 ), p...

... and the development of innovative numerical techniques. In this frame, reduced order models (ROM) become necessary tools for making the FE analyses faster without losing the accuracy of the full FE model solutions. Friction Structural dynamics Vibration Wear 04 07 2017 31 08 2017...

..., 2017; published online October 17, 2017. Editor: David Wisler. 05 07 2017 25 07 2017 Convective heat transfer Energy conversion Friction Heat transfer Modeling Power systems Structural dynamics Wear Turbocharging is a common method to make an automotive engine...

... transfer Turbines Wear The reduction of fuel consumption and emissions is the most dominant challenge in powertrain development. In the past few years, gasoline direct injection (GDI) downsizing was the key engine technology used to reduce CO 2 emissions while offering excellent transient...

... URBINES AND P OWER . Manuscript received July 5, 2017; final manuscript received July 5, 2017; published online September 19, 2017. Editor: David Wisler. 05 07 2017 05 07 2017 Aerospace applications Friction Gas turbine technology Wear Foil bearings (FB) using air or gas...

... 2016 14 07 2017 Experimental Friction Wear Gas bearings are fluid film bearings that utilize a gas as the working fluid, typically the same gas as the process of a turbomachine (compressor, turboexpander, etc.). Gas bearings for turbomachinery have notable advantages over...

...Donghyun Lee; Daejong Kim 26 01 2017 27 01 2017 Friction Fuel cell applications Gas turbine technology Wear Equation (7) in the paper should have been (7) V θ − D = 1 − D ( Q θ + ∂ M r θ ∂ r ) = ∂ r ∂ θ...

... to rapidly dropping rotor–housing natural frequencies. The impact of introducing effective swirl brakes for the stages' wear ring seals was investigated for a pump running at 3600 rpm. Their predicted impact on stability and synchronous response was: (1) Onset speeds of instabilities (OSIs) were elevated...

... Modeling Structural dynamics Wear 15 06 2016 12 10 2016 Contributed by the IC Engine Division of ASME for publication in the J OURNAL OF E NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received June 15, 2016; final manuscript received October 12, 2016; published online...

... October 11, 2016. Editor: David Wisler. 14 07 2016 14 07 2016 Computational mechanics Finite element methods Friction Structural dynamics Vibration Wear Increasingly tight operating clearances between rotating and static components of aircraft engines advantageously...

... to a contact of the bristles and the rotor surface. Besides abrasive wear occurrence, the friction between the bristles and the rotor leads to heat generation which can be detrimental to turbine operation due to thermal effects, leading to rotor bending connected to increasing shaft vibrations. In order...

...; published online September 20, 2016. Editor: David Wisler. 22 06 2016 09 07 2016 Computational mechanics Flow induced vibration Friction Periodic Structural dynamics Flow induced noise Wear Gas turbine engines and their major components are usually assembled structures...

..., the motion at the frictional interfaces can lead to a highly nonlinear dynamic response and cause fretting wear at the contact. The latter will change the contact conditions of the interface and consequently impact the nonlinear dynamic response of the entire assembly. Accurate prediction of the nonlinear...