Results 31 to 40 of about 13,402 (209)

Numerical Study on Vortical Flow Structure and Performance Enhancement of Centrifugal Compressor Impeller

Applied Sciences, 2022
The performance and efficiency of a centrifugal compressor are usually affected by the highly complex 3-dimensional flow structures which develop in the flow field of the compressor.
Seongbin Hong, Jophous Mugabi, Jae-Ho Jeong   +2 more
doaj   +1 more source

Focusing Schlieren Visualization of Transonic Turbine Tip-Leakage Flows

International Journal of Turbomachinery, Propulsion and Power, 2020
This paper presents a focusing schlieren system designed for the investigation of transonic turbine tip-leakage flows. In the first part, the functional principle and the design of the system are presented. Major design considerations and necessary trade-
Maximilian Passmann, Stefan aus der Wiesche, Franz Joos   +2 more
doaj   +1 more source

Analysis of the Formation Mechanism of Secondary Tip Leakage Vortex (S-TLV) in an Axial Flow Pump

Machines, 2022
Studies on the tip leakage vortex (TLV) are extensive, while studies on the secondary tip leakage vortex (S-TLV) are rare. To advance the understanding of the formation mechanism of the S-TLV, turbulent cavitating flows were numerically investigated ...
Hu Zhang, Jianbo Zang, Desheng Zhang, Weidong Shi, Jiean Shen   +4 more
doaj   +1 more source

Improved High Contrast Imaging with On-Axis Telescopes using a Multi-Stage Vortex Coronagraph [PDF]

, 2011
The vortex coronagraph is one of the most promising coronagraphs for high contrast imaging because of its simplicity, small inner working angle, high throughput, and clear off-axis discovery space.
Abe, Baudoz, Dimitri Mawet, Eugene Serabyn, Foo, J. Kent Wallace, Jenkins, Laurent Pueyo, Mawet, Mawet, Mawet, Mawet, Serabyn, Swartzlander, Yaitskova   +14 more
core   +3 more sources

Influences of tip leakage flows on flow field at design condition in transonic centrifugal compressor with splitter blade

Nihon Kikai Gakkai ronbunshu, 2016
A tip leakage flow is well known to have predominant influence on a loss generation in a compressor. An impeller for a transonic centrifugal compressor is generally composed of the main and the splitter blades to gain the choke flow rate.
Masanao KANEKO, Hoshio TSUJITA
doaj   +1 more source

Tip Leakage Vortex Cavitation from the Tip Clearance of a Single Hydrofoil

JSME International Journal Series B, 2002
Abstract Focusing on the tip leakage vortex cavitation, experimental and numerical studies were carried out as the first step of the investigation of cavitations in tip leakage flow. For a single hydrofoil with a tip clearance, tip leakage vortex cavitations were observed for various cavitation numbers and angles of attack.
Seiji HIGASHI, Yoshiki YOSHIDA, Yoshinobu TSUJIMOTO   +2 more
openaire   +2 more sources

On-sky demonstration of low-order wavefront sensing and control with focal plane phase mask coronagraphs [PDF]

, 2015
The ability to characterize exoplanets by spectroscopy of their atmospheres requires direct imaging techniques to isolate planet signal from the bright stellar glare.
Baudoz, Pierre, Guyon, Olivier, Jovanovic, Nemanja, Kudo, Tomoyuki, Kuhn, Jonas, Lozi, Julien, Martinache, Frantz, Serabyn, Eugene, Singh, Garima   +8 more
core   +5 more sources

Numerical Analysis of the Effects of Different Rotor Tip Gaps in a Radial Turbine Operating at High Pressure Ratios Reaching Choked Flow

Energies, 2022
To operate, radial turbines used in turbochargers require a minimum tip gap between the rotor blades and the stationary wall casing (shroud). This gap generates leakage flow driven by the pressure difference between the pressure and suction side. The tip
José Galindo, Andrés Tiseira, Roberto Navarro, Lukas Benjamin Inhestern, Juan David Echavarría   +4 more
doaj   +1 more source

Interference Effect of Shock Wave on Tip Leakage Vortex in a Transonic Variable Nozzle Turbine

International Journal of Turbomachinery, Propulsion and Power
The tip leakage flow at both sides of the nozzle vane is an important factor for the reduction in turbine aerothermal performance. A strong shock wave is generated at the trailing edge of the nozzle vane under transonic condition, which can interfere ...
Xinguo Lei, Qin Luo, Hanzhi Zhang
doaj   +1 more source

Numerical and Experimental Analysis of Transient Flow in Roots Blower [PDF]

, 2018
The performance of rotary positive displacement machines highly depends on the operational clearances. It is widely believed that computational fluid dynamics (CFD) can help understanding internal leakage flows.
Bruecker, C., Ghavami, M., Kovacevic, A., Leto, A., Singh, G., Sun, S. H.   +5 more
core   +1 more source