Results 231 to 240 of about 5,221 (262)

Facing the Challenges in CFD Modelling of Multistage Axial Compressors

Volume 2B: Turbomachinery, 2017
Multistage axial compressors have always been a great challenge for designers since the flow within these kind of machines, subjected to severe diffusion, is usually characterized by complex and widely developed 3D structures, especially next to the endwalls. The development of reliable numerical tools capable of providing an accurate prediction of the
COZZI, LORENZO, RUBECHINI, FILIPPO, MARCONCINI, MICHELE, ARNONE, ANDREA, Astrua, P, Schneider, A, Silingardi, A.   +6 more
openaire   +2 more sources

Dynamic simulations of post-stall performance in multistage axial compressors

Journal of Thermal Science, 2012
In this contribution a quasi-one-dimensional tool for stationary and transient simulations of post-stall flows in multistage axial compressors is presented. An adapted version of the 1D Euler equations with additional source terms is discretized with a finite volume method and solved in time by a fourth-order Runge-Kutta scheme.
Wenhai Du, JunQiang Zhu, Olivier Léonard   +2 more
openaire   +1 more source

Simulation of Surge Inception and Performance of Axial Multistage Compressor

Volume 6: Turbomachinery, Parts A and B, 2006
This work concerns transient multistage turbomachine modeling. The main application is the simulation of off-design regimes and unstable situations (essentially surge). Two specific approaches are developed: the first is a simple and fast model, based on a simplification of actuator disk model (0D).
Tauveron, Nicolas, Ferrand, Pascal, Leboeuf, Francis   +2 more
openaire   +2 more sources

Unsteady Flow Effects in a High-Speed Multistage Axial Compressor

Volume 7: Turbomachinery, Parts A and B, 2009
As a first step in practical application of virtual rig test, in present work, a full unsteady multistage simulation was performed for a 6-stage transonic axial compressor at design point. A steady multistage simulation was also performed and compared with the results of the unsteady simulation to clarify the unsteady flow effects.
Mai Yamagami, Hidekazu Kodama, Dai Kato, Naoki Tsuchiya, Yasuo Horiguchi, Junichi Kazawa   +5 more
openaire   +1 more source

A Methodology for Variable Geometry Optimization of Multistage Axial Compressors

Volume 2A: Turbomachinery, 2017
This paper presents a procedure for experimentally optimizing a multistage axial compressor. Due to the usual proprietary nature of such tests, a mean-line model of a nine-stage compressor with three rows of variable geometry is used instead of a real machine as a testbed for explaining the optimization method.
M. Eric Lyall, Fred J. Eisert, Douglas C. Rabe, Patrick M. Fleisher   +3 more
openaire   +1 more source

Multistage Axial Compressor Program on Tip Clearance Effects.

1981
Abstract : Tip clearance has long been known to be a source of losses in axial compressors with cantilevered blades. The reasons for the losses, however, are not well understood and current practice in engine design still requires extensive effort to maintain constant minimal operating clearances over a wide range of conditions.
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Efficient Time Resolved Multistage CFD Analysis Applied to Axial Compressors

Volume 2D: Turbomachinery, 2014
Unsteady computations are necessary if blade row interactions effects are relevant, for example for detailed optimization of a compressor at off-design conditions towards the aerodynamic stability limit, or for structural mechanical tuning of the blades.
Christian Cornelius, Thomas Biesinger, Laith Zori, Rubens Campregher, Paul Galpin, André Braune   +5 more
openaire   +1 more source

Optimization Algorithm for Axial Multistage Compressor Workflow

AIAA Propulsion and Energy 2020 Forum, 2020
Grigorii M. Popov, Oleg Baturin, Evgenii Goriachkin, Daria A. Kolmakova, Andrei Volkov, Igor Egorov   +5 more
openaire   +1 more source

A New Multistage Axial Compressor Designed With the APNASA Multistage CFD Code: Part 2 — Application to a New Compressor Design

Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 2001
In this second part of a two-part paper on the application of the NASA multistage aerodynamic simulation CFD tool, the APNASA code, work is presented on how the code was used successfully in the design of a brand new, four-stage axial compressor aimed for a modern turbofan engine.
Y. Dong, M. Mansour, S. Hingorani, J. Hayes   +3 more
openaire   +1 more source

Construction of axial chirality via asymmetric radical trapping by cobalt under visible light

Nature Catalysis, 2022
, Xiaotian Qi, Liang-Qiu Lu
exaly