...Ryosuke Seki; Toshihiko Azuma; Junji Iwatani; Akihiro Nakaniwa; Hidetaka Okui; Takanori Shibata In this article, an unsteady tip leakage flow instability is identified and investigated for an axial compressor at near-surge conditions. We describe the results of experimental verification of a new...

...Edwin J. Munoz Lopez; Alexander Hergt; Sebastian Grund; Volker Gümmer The design of compressor blades has been transformed by the advent of optimization algorithms, allowing designers to focus on finding the best optimization strategy for a desired application. However, transonic flow conditions...

...Cedric Babin; Xavier Ottavy; Fabrizio Fontaneto This paper presents the investigation of realistic cavity leakage flow for the von Karman Institute for Fluid Dynamics H25 axial compressor stage, equipped with a shroud cavity of average Reynolds number Re r = 2.2 * 10 6 and average aspect ratio G...

...: daku.gabor@gpk.bme.hu Email: vad.janos@gpk.bme.hu Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 16 11 2022 10 01 2023 10 01 2023 10 02 2023 fan compressor and turbine aerodynamic design...

... for publication in the J ournal of T urbomachinery . 11 02 2022 18 11 2022 18 11 2022 30 01 2023 fan compressor and turbine aerodynamic design Turbochargers have become a common component in automotive powertrains and are increasingly relied on to improve engine power...

... 18 12 2022 19 12 2022 09 01 2023 fan compressor and turbine aerodynamic design turbine blade and measurement advancements turbomachinery blading design National Natural Science Foundation of China 10.13039/501100001809 52076001 An intermediate turbine...

...Joshua M. Maynard; Andrew P. S. Wheeler; James V. Taylor; Roger Wells Direct numerical simulations (DNS) are performed of a cantilevered stator blade to identify the unsteady and turbulent flow structure within compressor tip flows. The simulations were performed with clearances of 1.6% and 3.2...

...Michael Casey; Christopher Robinson A diagram is described which demonstrates important aspects of the exit velocity triangle of a radial compressor impeller with no inlet swirl. Although this diagram is based on work dating back to 1941, it is not widely known in the radial compressor community...

...Julien Marty; Lionel Castillon; Pierric Joseph The operating range of a compressor is limited by surge or rotating stall line, among others. Numerical simulations must accurately predict these phenomena. This study is based on the experimental compressor CME2, which is a low-subsonic axial...

...Yoshihiro Hayashi; Teng Cao In centrifugal compressors, it is common to observe a rapid reduction in surge margin toward high rotational speed, which shows a non-linear surge characteristic against the change of rotational speed. This paper presents a comprehensive experimental and numerical study...

...Armando Del Rio; Ernesto Casartelli; Benno Fleischli; Luca Mangani Centrifugal compressors are mainly designed with the best efficiency point in mind and the focus oriented toward the impeller. The vaned diffuser geometry is usually developed using simple shapes, such as prismatic blades or wedges...

...Sungho Yoon; Patricia Cargill Casing treatment is an advanced design feature intended to improve the stability of a compressor. Various investigations have been conducted based on both experimental and numerical studies at least over the last 50 years. In general, it has been demonstrated...

... Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 08 05 2021 19 08 2022 19 08 2022 04 11 2022 computational fluid dynamics (CFD) fan compressor and turbine aerodynamic design fluid dynamics and heat...

... buffet aeromechanical instabilities computational fluid dynamics (CFD) fan compressor and turbine aerodynamic design turbomachinery blading design Civil turbofan engine technology development is propelled by the ever-increasing demand for reducing specific fuel consumption (SFC...

...Xiawen Zhang; Yaping Ju; Zhen Li; Feng Liu; Chuhua Zhang The tradeoff between higher efficiency and wider stability of performance map is still one of the bottlenecks to hamper the further research and development of advanced multistage axial-flow compressor. The recent rapid growth...

...Tobias Doerr; Sebastian Schuster; Dieter Brillert Droplet-laden flows play a significant role in the development of turbomachinery. For example, fine water droplets are injected into the flow path of axial compressors to increase the power output of gas turbines by making use of evaporation cooling...

...Krishan S. Chana; Robert J. Miller Reaction is the fundamental parameter by which the asymmetry of the velocity triangle of a stage is set. Little is understood about the effect that a reaction has on either the efficiency or the operating range of a compressor. A particular difficulty...

... (CFD) airfoil cascade fan compressor and turbine aerodynamic design turbomachinery blading design The design of axial flow fans is often characterized by the use of blade sections whose solidity spans from low (e.g., 1.0) to very low values (e.g., 0.1), both for the rotor and the stator...

... compressor and turbine aerodynamic design turbomachinery blading design In this paper, we define design strategies for nonaxisymmetric fan exit guide vanes (FEGVs, or stators), to mitigate the effects of inlet distortion on fan efficiency and aeromechanical operability. Inlet distortion, typically...

...J. D. Chiapperi; E. M. Greitzer; C. S. Tan In this paper, we (i) present a methodology for determining the aerodynamic performance of bi-directional turbomachines for pumped thermal energy storage, i.e., turbomachines designed to operate as a compressor in one direction, and then as a turbine...