Results 281 to 290 of about 46,935 (306)

Flow Mechanism for Stall Margin Improvement Due to Circumferential Casing Grooves on Axial Compressors

Volume 5: Turbo Expo 2004, Parts A and B, 2004
A computational study is carried out to understand the physical mechanism responsible for the improvement in stall margin of an axial flow rotor due to the circumferential casing grooves. It is shown that the computational tool used predicts an increase in operating range of the rotor when casing groves are present.
Aamir Shabbir, John J. Adamczyk
openaire   +1 more source

A new unsteady casing treatment for micro centrifugal compressors to enlarge stall margin

Aerospace Science and Technology, 2020
Abstract Tip clearance flow, particularly tip leakage vortex, is an important source of losses in centrifugal compressor rotors, which limits the stall margin and even causes compressor surge. To address this issue, a passive unsteady flow control method is proposed with equal-circumferential-spacing through-holes on the casing of a micro centrifugal
Guoping Huang, Yuxuan Yang, Shuli Hong, Zepeng Liu, Shuang Du   +4 more
openaire   +1 more source

Stall Margin Improvement in a Transonic Compressor With a Casing Treatment: Flow Mechanism

Journal of Turbomachinery, 2022
Abstract A compressor casing treatment with circumferential casing grooves (CCGs) is studied in detail. The primary objective of the current paper is to unearth the main driving fluid mechanism that changes the stall margin in a transonic compressor with CCGs.
openaire   +1 more source

Efficiency and Stall Margin Enhancement in Transonic Compressor Rotors Using Synthetic Jets: A Numerical Investigation

Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C, 2009
Several passive and active techniques were studied and developed by compressor designers with the aim of improving the aerodynamic behavior of compressor blades by reducing, or even eliminating, flow separation. Fluidic-based methods, in particular, were investigated for a long time, including both steady and unsteady suction, blowing and oscillating ...
Benini E., Biollo R., Ponza R.
openaire   +3 more sources

Stall margin improvement of a centrifugal compressor utilizing various stepped tip gap configurations

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2014
Aerodynamic performance of a centrifugal compressor is investigated under various casing treatment configurations of stepped tip gap type, numerically. This technique is introduced as an effective method for improvement of compressor stall margin and consequent enhancement of the compressor overall performance.
Reza Taghavi-Zenouz, Ehsan Solki, Hadi Afshari   +2 more
openaire   +1 more source

Calculation of Stall Margin Enhancement With Micro-Tip Injection in an Axial Compressor

Journal of Fluids Engineering, 2019
Although steady micro-injection is experimentally validated as an attractive method in improving the stall margin of axial compressors, up to now a fast prediction of stall boundary remains some way off. This investigation is to propose such a prediction model.
Xiaohua Liu, Jinfang Teng, Jun Yang, Xiaofeng Sun, Dakun Sun, Chen He, Juan Du   +6 more
openaire   +1 more source

An Experimental Investigation on the Mechanism of Stall Margin Improvement of Casing Treatment

Volume 1: Aircraft Engine; Turbomachinery, 1985
A single-rotor axial flow compressor and a two-dimensional cascade have been tested with and without casing treatment. A three-dimensional flow mechanism of the onset of rotating stall is suggested. It gives good reason to explain the mechanism of stall-margin improvement of casing treatment.
Zhuang Ping, Lu Ya-Jun, Li Bao-Ju, Feng Yu-Chen   +3 more
openaire   +1 more source

Stall margin indication

General Aviation Technology Conference, 1986
Arthur W. Hoadley, Raymond S. VanderBok
openaire   +1 more source

Stall margin indicator development

Aircraft Systems, Design and Technology Meeting, 1986
A. HOADLEY, R. VANDERBOK
openaire   +1 more source

Effect of blade squealer tips on aerodynamic performance and stall margin in a transonic centrifugal compressor with vaned diffuser

Aerospace Science and Technology, 2022
Ali Zamiri, Minsuk Choi, Jin Taek Chung
exaly