|
|
|
|
|
Ran Li, Jie Gong, Wei Chen, Jie Li, Wei Chai, Chang-kyu Rheem and Xiaobin Li
Numerical simulations are carried out to investigate the vortex-induced vibrations of a two-degree-of-freedom (2DOF) near-wall rotating cylinder. Considering the effects of gap ratio, reduced velocity and rotational rate, the amplitude response, wake var...
ver más
|
|
|
|
|
|
|
|
|
|
|
Srinivasa Rao Nadiminti, Adiyapatham Kandasamy
Pág. 167 - 179
A finite difference analysis of the entrance region flow heat transfer of Bingham fluid in concentric annuli with rotating inner wall has been carried out. The analysis is made for simultaneously developing hydrodynamic and thermal boundary layer in conc...
ver más
|
|
|
|
|
|
|
|
|
|
|
Lucian Hanimann, Luca Mangani, Ernesto Casartelli, Elmar Gröschel and Magnus Fischer
The demand for increased turbomachinery performance, both, towards higher pressures and temperatures, leads to high thermal-loads of specific components and can critically affect mechanical integrity. In the particular case of rotating-disk configuration...
ver más
|
|
|
|
|
|
|
|
|
|
|
Lisong Shi, E Fan, Hua Shen, Chih-Yung Wen, Shuai Shang and Hongbo Hu
A three-dimensional upwind conservation element and solution element method (CESE) in cylindrical coordinates is first developed to effectively solve the unsteady reactive Euler equations governing a hydrogen?air rotating detonation engine (RDE) with coa...
ver más
|
|
|
|
|
|
|
|
|
|
|
Constantin Tanasa, Alin Bosioc, Sebastian Muntean and Romeo Susan-Resiga
In this paper, we introduce a novel passive control method to mitigate the unsteadiness effects associated to the swirling flows with self-induced instabilities. The control method involves a progressive throttling cross-section flow at the outlet of the...
ver más
|
|
|
|
|
|
|
|
|
|
|
Elias Sundström, Mihai Mihaescu, Marco Giachi, Elisabetta Belardini and Vittorio Michelassi
Numerical simulations based on the large eddy simulation approach were conducted with the aim to explore vaneless diffuser rotating stall instability in a centrifugal compressor. The effect of the impeller blade passage was included as an inlet boundary ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alexandra P. Schneider, Benoit Paoletti, Xavier Ottavy and Christoph Brandstetter
Experimental monitoring of blade vibration in turbomachinery is typically based on blade-mounted strain gauges. Their signals are used to derive vibration amplitudes which are compared to modal scope limits, including a safety factor. According to indust...
ver más
|
|
|
|
|
|
|
|
|
|
|
Roland Rückert and Dieter Peitsch
The present paper investigates the aerodynamic performance of a cantilevered tandem stator based on experiments conducted within a high speed annular test rig at the Technische Universitaet Berlin. A tandem blade in this context describes a double rowed ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Haixuan Ye, Yang Chen and Kevin Maki
For numerical simulations of ship and offshore hydrodynamic problems, it is challenging to model the interaction between the free surface and moving complex geometries. This paper proposes a discrete-forcing immersed boundary method (IBM) to efficiently ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alireza Khalili Asboei, Yousef Vazifeshenas, Mazaher Rahimi-Esbo, Reza Mohammadyari, Vandana .
Pág. e37348
A comparative investigation of enhanced heat transfer and friction factor by insertion of twisted tapes consisting of alternate axes and regularly spaced tapes in a round tube under wall heat flux condition is presented in this paper. This effort e...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alireza Khalili Asboei, Yousef Vazifeshenas, Mazaher Rahimi-Esbo, Reza Mohammadyari, Vandana . (Author)
Pág. e37348
A comparative investigation of enhanced heat transfer and friction factor by insertion of twisted tapes consisting of alternate axes and regularly spaced tapes in a round tube under wall heat flux condition is presented in this paper. This effort e...
ver más
|
|
|
|
|
|
|
|
|
|
|
David Lamidel, Guillaume Daviller, Michel Roger and Hélène Posson
A Large-Eddy Simulation of the tip leakage flow of a single airfoil is carried out. The configuration consists of a non-rotating, isolated airfoil between two horizontal plates with a gap of 10 mm between the tip of the airfoil and the lower plate. The M...
ver más
|
|
|
|
|
|
|
|
|
|
|
Dianhai Liu, Xiang Xia, Jing Yang and Zhengwei Wang
To predict the resonance characteristics of hydraulic machinery, it is necessary to accurately calculate the natural modes of the runners in the operating environment. However, in the existing research, the boundary conditions of the numerical modal anal...
ver más
|
|
|
|
|
|
|
|
|
|
|
Wenchuan Zhang, Junxing Wang, Chuangbing Zhou, Zongshi Dong and Zhao Zhou
A new type of vortex drop shaft without ventilation holes is proposed to resolve the problems associated with insufficient aeration, negative pressure (Unless otherwise specified, the pressure in this text is gauge pressure and time-averaged pressure) on...
ver más
|
|
|
|
|
|
|
|
|
|
|
Zhou Shen, Beimeng Hu, Guozhan Li and Hongjun Zhang
The effects of the coolant pulsation and the plasma aerodynamic actuation (PAA) on the film cooling are herein explored via large eddy simulations. The electrohydrodynamic force derived from the PAA was solved through the phenomenological plasma model. T...
ver más
|
|
|
|
|
|
|
|
|
|
|
Jiaxin Zhang, Kan Hong, Yeping Yuan, Ying-Tien Lin and Dongrui Han
A three-dimensional numerical model was established with OpenFOAM-5.x to investigate plume characteristics under windless and rainless weather conditions. The large eddy simulation was applied, combined with a modified solver for solving governing equati...
ver más
|
|
|
|
|
|
|
|
|
|
|
Hongmei Jiang, Xu Peng, Wenbo Xie, Shaopeng Lu and Yongmin Gu
The high-speed Over-Tip-Leakage (OTL) flow has a significant impact on the aerodynamic performance of the High-Pressure Turbine (HPT) passage and generates high thermal load for the blade tip. Different tip sealing and cooling design strategies are appli...
ver más
|
|
|
|
|
|
|
|
|
|
|
Christer Fureby, Guillaume Sahut, Alessandro Ercole and Thommie Nilsson
Large Eddy Simulation (LES) has rapidly developed into a powerful computational methodology for fluid dynamic studies, between Reynolds-Averaged Navier?Stokes (RANS) and Direct Numerical Simulation (DNS) in both accuracy and cost. High-speed combustion a...
ver más
|
|
|
|
|
|
|
|
|
|
|
Guangyu Wang, Shijie Liu, Haoyang Peng and Weidong Liu
A continuous detonation engine with various exhaust nozzles, analogous to typical scramjet cavity combustors with variable rear-wall heights, was adopted to perform a succession of cylindrical air-breathing continuous rotating detonation experiments fuel...
ver más
|
|
|
|
|
|
|
|
|
|
|
Shihao Zhou, Peifeng Lin, Wei Zhang and Zuchao Zhu
Flow separation is undesirable and lowers the efficiency of centrifugal impellers. In this study, the evolution characteristics of separated vortices in a centrifugal impeller are studied under the off-designed flow rate condition. Unsteady Reynolds-Aver...
ver más
|
|
|
|
|
|