Results 31 to 40 of about 32,232 (297)
Two-Dimensional Rotating Stall Analysis in a Wide Vaneless Diffuser
International Journal of Rotating Machinery, 2006 We report a numerical study on the vaneless diffuser core flow instability in centrifugal compressors. The analysis is performed for the purpose of better understanding of the rotating stall flow mechanism in radial vaneless diffusers. Since the analysis
S. Ljevar +2 more
doaj +2 more sources
Numerical Investigation of a Dynamic Stall on a Single Rotating Blade
Aerospace, 2021 Dynamic stall is a phenomenon on the retreating blade of a helicopter which can lead to excessive control loads. In order to understand dynamic stall and fill the gap between the investigations on pitching wings and full helicopter rotor blades, a ...
Yin Ruan, Manfred Hajek
doaj +1 more source
Unified Treatment of Flow Instabilities of Turbomachines [PDF]
, 2001 The relationship among four flow instabilities of turbomachines, namely, surge, rotating stall, cavitation surge, and rotating cavitation, is elucidated, using a unified or common model for their analysis. The simplest unifying model was employed in the
Brennen, Christopher E. +2 more
core +1 more source
A stall‐delay model for rotating blades [PDF]
PAMM, 2007 AbstractThe paper is aimed at describing a fundamental phenomenon: the effect of rotation on the inboard blade boundary layer on a wind turbine. The three‐dimensional incompressible steady momentum integral boundary‐layer equations are used to predict the boundary‐layer growth and limiting streamline angles on the blade surface for both attached and ...
Horia Dumitrescu, Vladimir Cardos
openaire +1 more source
Comparative study of subsynchronous rotating flow patterns in centrifugal compressors with vaneless diffusers [PDF]
, 1982 A comparative experimental investigation of the unstable operating modes of a centrifugal compressor was made. Impeller and/or diffuser rotating stall was observed, depending on the flow conditions.
Frigne, P., Vandenbraembussche, R.
core +1 more source
Tip-Clearance Actuation With Magnetic Bearings for High-Speed Compressor Stall Control [PDF]
, 2000 Magnetic bearings are widely used as active suspension devices in rotating machinery, mainly for active vibration control purposes. The concept of active tip clearance control suggests a new application of magnetic bearings as servo-actuators to ...
Bright, M. M. +4 more
core +1 more source
AAA+ protein unfoldases—the Moirai of the proteome
FEBS Letters, EarlyView.AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley +1 more source
Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing
Advanced Engineering Materials, EarlyView.This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu +10 more
wiley +1 more source
Advanced Healthcare Materials, EarlyView.This review examines how in vitro electrical and mechanical stimulation modulates wound healing in fibroblasts and keratinocytes. Analyzing over 560 experimental data points, we relate stimulation parameters to proliferation and migration outcomes, evaluate platform designs, and highlight the need for multi‐parameter optimization to advance targeted ...
Matthew K. Burgess +3 more
wiley +1 more source
Applied Sciences, 2017 Axial compressors in aero engines are prone to suffering a breakdown of orderly flow when operating at the peak of the pressure rise characteristic. The damaging potential of separated flows is why a safe distance has to be left between every possible ...
Mario Eck, Silvio Geist, Dieter Peitsch
doaj +1 more source