|
|
|
|
|
Yuanqiang Liu, Yan Liu, Zubi Ji, Yutian Wang and Jiakuan Xu
Surface suction provides an efficient way to delay boundary layer transitions. In order to verify the suction effects and determine the mechanism of suction control in transonic swept wing boundary layers, wind tunnel transition measurements in a hybrid ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Gyuzel Yakhina, Michel Roger, Stéphane Moreau, Lap Nguyen and Vladimir Golubev
An experimental and analytical study of the tonal trailing-edge noise of a symmetric NACA-0012 aerofoil and of a cambered SD7003 aerofoil has been achieved. It provides a complete experimental database for both aerofoils and improves the understanding of...
ver más
|
|
|
|
|
|
|
|
|
|
|
Bálint Lendvai, Tamás Benedek
Pág. 279 - 288
At moderate Reynolds numbers and angles of attack, the Laminar Boundary Layer (LBL) becomes unstable on the surface of airfoils, and causes periodic vortex shedding, which means undesired tonal peaks in the spectrum of the emitted aeroacoustic noise alon...
ver más
|
|
|
|
|
|
|
|
|
|
|
Shuang Sun, Jinhui Kang, Zhijun Lei, Zhen Huang, Haixv Si and Xiaolong Wan
The horseshoe vortex system at the leading edge of a low-pressure turbine (LPT) has unsteady flow characteristics, and the flow field in the downstream cascade channel also has unsteady characteristics. In this study, CFD simulations are performed with t...
ver más
|
|
|
|
|
|
|
|
|
|
|
Aristia L. Philippou, Pavlos K. Zachos and David G. MacManus
High-speed air intakes often exhibit intricate flow patterns, with a specific type of flow instability known as ?buzz?, characterized by unsteady shock oscillations at the inlet. This paper presents a comprehensive review of prior research, focused on un...
ver más
|
|
|
|
|
|
|
|
|
|
|
Matteo Dellacasagrande, Davide Lengani, Daniele Simoni and Marina Ubaldi
The bursting phenomenon consists in the switch of a laminar separation bubble from a short to a long configuration. In the former case, reduced effects on profile pressure distribution are typically observed with respect to the attached condition. On the...
ver más
|
|
|
|
|
|
|
|
|
|
|
Jing Li, Chunbao Liu and Xiaoying Li
This paper examines the effects on a Clark-y three-dimensional hydrofoil of wavy leading-edge protuberances in a quantitative and qualitative way. The simulation is accompanied by a hybrid RANS-LES model in conjunction with Zwart-Gerber?Belamri model. De...
ver más
|
|
|
|
|
|
|
|
|
|
|
Slawomir Kubacki, Daniele Simoni, Davide Lengani and Erik Dick
An algebraic intermittency model for boundary layer flow transition from laminar to turbulent state, is extended using an experimental data base on boundary layer flows with various transition types and results by large eddy simulation of transition in a...
ver más
|
|
|
|
|
|
|
|
|
|
|
Hao Chen, Chuanqiang Gao, Jifei Wu, Kai Ren and Weiwei Zhang
Transonic buffet is a phenomenon of large self-excited shock oscillations caused by shock wave-boundary layer interaction, which is one of the common flow instability problems in aeronautical engineering. This phenomenon involves unsteady flow, which mak...
ver más
|
|
|
|
|
|
|
|
|
|
|
Xinyi Liu, Zhenbing Luo, Qiang Liu, Pan Cheng and Yan Zhou
Transition delaying is of great importance for the drag and heat flux reduction of hypersonic flight vehicles. The first mode, with low frequency, and the second mode, with high frequency, exist simultaneously during the transition through the hypersonic...
ver más
|
|
|
|
|
|
|
|
|
|
|
Wonjeong Hyun, Jina Kim, Heesang Chae and Changjin Lee
The occurrence of low-frequency instability (LFI) appears to be related to multiple interactions among many complex physical processes, such as vortex shedding, boundary-layer oscillation, and additional combustion in the post-combustion chamber. In this...
ver más
|
|
|
|
|
|
|
|
|
|
|
Andreas Gross and Hermann F. Fasel
When a laminar boundary layer is subjected to an adverse pressure gradient, laminar separation bubbles can occur. At low Reynolds numbers, the bubble size can be substantial, and the aerodynamic performance can be reduced considerably. At higher Reynolds...
ver más
|
|
|
|
|
|
|
|
|
|
|
Xia Luo, Ming Xue and Jianfang Fei
Based on the ARPS (Advanced Regional Prediction System) at 2 km grid spacing, the convective initiation (CI) of cells that evolved into a squall line on the southern flank of a Meiyu front in East China is investigated. The initiations of four convective...
ver más
|
|
|
|
|
|
|
|
|
|
|
Xiaotian Niu and Jie Li
Reducing drag is critical to aircraft design. In recent years, laminar technology has become one of the most important feasible technologies for civil aircraft drag reduction design under many design constraints. However, various factors have a certain i...
ver más
|
|
|
|
|
|