Search
CSV
RISBackward Traveling Rotating Stall Waves in Centrifugal Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Rotating stall waves that travel against the direction of rotor rotation are reported for the first time and a new, low-order analytical approach to model centrifugal compressor stability is ...
Analysis of Aerodynamically Induced Whirling Forces in Axial Flow Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A new analytical model to predict the aerodynamic forces in axial flow compressors due to asymmetric tip-clearance is introduced. The model captures the effects of tip-clearance induced distortion ...
Analysis of Tilting Effects and Geometric Nonuniformities in Micro-hydrostatic Gas Thrust Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The Massachusetts Institute of Technology (MIT) microengine rotors are supported by hydrostatic gas journal and hydrostatic gas thrust bearings. Due to the low length-to-diameter ratio of the ...
Modeling and Experimental Investigation of Micro-hydrostatic Gas Thrust Bearings for Micro-turbomachines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: One major challenge for the successful operation of high-power-density micro-devices lies in the stable operation of the bearings supporting the high-speed rotating turbomachinery. Previous modeling ...
Erratum: “Scaling Laws for Ultra-Short Hydrostatic Gas Journal Bearings” [Journal of Vibration and Acoustics, 2005, 127(3), pp. 254–261]
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The exponents of the clearance to radius term (C∕R) in the scaling law for damping ratio ζ in Eqs. 19,20 were inadvertently switched between these two equations. Equations 19,20 should ...
Scaling Laws for Ultra-Short Hydrostatic Gas Journal Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The journal bearings of the MIT micro-devices are located at the outer periphery of the rotor and are designed to operate at rotational speeds of order two million rpm in order to enable ...
Spike and Modal Stall Inception in an Advanced Turbocharger Centrifugal Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In turbocharger applications, bleed air near the impeller exit is often used for secondary flow systems to seal bearing compartments and to balance the thrust load on the bearings. There is ...
Effects of Bearing Stiffness Anisotropy on Hydrostatic Micro Gas Journal Bearing Dynamic Behavior
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The high-speed microhydrostatic gas journal bearings used in the high-power density MIT microengines are of very low aspect ratio with an L∕D of less than 0.1 and are running at surface speeds ...
A Criterion for Axial Compressor Hub-Corner Stall
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a new criterion for estimating the onset of three-dimensional hub-corner stall in axial compressor rotors and shrouded stators. A simple first-of-a-kind description of hub-corner ...
A Novel Turbomachinery Air-Brake Concept for Quiet Aircraft
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel air-brake concept for next-generation, low-noise civil aircraft is introduced. Deployment of such devices in clean airframe configuration can potentially reduce aircraft source noise and ...