Results 11 to 20 of about 12,448 (265)

Nacelle intake flow separation reduction at cruise condition using active flow control

Propulsion and Power Research, 2022
Turbofan engine intakes are designed to provide separation-free flow at the fan face over a wide range of operating conditions. But at some off-design conditions, like at high flight speeds and high angles of attack (AoA), the aero engine intake may ...
Vinayak Ramachandran Nambiar, Vassilios Pachidis   +1 more
doaj   +1 more source

Charge-to-mass ratio of individual blowing-snow particles [PDF]

Annals of Glaciology, 1998
Determining the electrostatic force acting on saltating snow particles requires knowledge of the electric field in the saltation region and the charge on the particle. To date, measurements of average charge-to-mass ratios for blowing-snow samples have been made but Schmidt and Schmidt (1993) have indicated these may underestimate ...
D. S. Schmidt, J. D. Dent, R. A. Schmidt
openaire   +1 more source

Improving the efficiency of a serpentine inlet duct by using of Blowing Jet Vortex Generators flow control technique [PDF]

مجله مدل سازی در مهندسی, 2018
In this research, aerodynamic performance of a double s-shaped serpentine inlet duct is numerically investigated by using of blowing Jet vortex generators flow control technique.
iman Maghsoudi, mostafa mahmoodi, mohammad ali vaziri zanjani   +2 more
doaj   +1 more source

Enhancement of Wind Turbine Performance Using Air- Blowing Technique by Modified Strong Implicit Procedure (MSIP) Optimization Solver Method [PDF]

Engineering and Technology Journal, 2014
A powerful intensifier of friction in air flows affects the lift and drag coefficients, the flow separation plays a vital part in aerodynamic characteristics for technical applications.
Abdulhadi Mohammed Jawad, Muhannad Zedan Khelifa, Mustafa Sami Abdullateef, Yasser Ahmed Mahmood   +3 more
doaj   +1 more source

Numerical Investigation of the Effects of Lattice Array Structures on Film Cooling Performance

Energies, 2022
To better understand the mechanism influencing the periodic lattice structures in gas turbine blade cooling, these numerical simulations present a systematic comparison of the effects in cases involving pin-fin, Kagome, and BCC lattice arrays on film ...
Qiang Fu, Xiaobo Luo, Wei Chen, Minking K. Chyu   +3 more
doaj   +1 more source

Numerical Investigation on Backward-Injection Film Cooling with Upstream Ramps

Energies, 2022
The present study investigates the effects of upstream ramps on a backward-injection film cooling over a flat surface. Two ramp structures, referred to as a straight-wedge-shaped ramp (SWR) and sand-dune-shaped ramp (SDR), are considered under a series ...
Shengchang Zhang, Chunhua Wang, Xiaoming Tan, Jingzhou Zhang, Jiachen Guo   +4 more
doaj   +1 more source

Flow Separation Control of an Ultra-compact S-shaped Convergent-divergent Nozzle Using the Blowing Method [PDF]

Journal of Applied Fluid Mechanics
To enhance the aerodynamic performance of an ultra-compact S-shaped convergent-divergent nozzle and mitigate flow separation, numerical simulations were conducted using FLUENT software.
J. W. Shi, Z. H. Hui, L. Zhou, Z. X. Wang   +3 more
doaj   +1 more source

Experimental investigation of the film cooling performance by triangular-shaped thin plates on inclined cylindrical holes

Frontiers in Energy Research, 2022
Experimental investigations have been conducted to improve the cooling effectiveness of film-cooling technology. A multiple row of cylindrical holes at the flat surface was considered by inclining the holes at 35° along the streamwise direction.
Jaemun Choi, Jaehun Choi, Hwabhin Kwon, Hoyong Jang, Heesung Park, Heesung Park   +5 more
doaj   +1 more source

Numerical Investigation of the Effects of the Hole Inclination Angle and Blowing Ratio on the Characteristics of Cooling and Stress in an Impingement/Effusion Cooling System

Energies, 2023
Due to the uneven temperature field and temperature gradient introduced by an efficient cooling structure, the analysis of the stress field is necessary. In this study, the cooling characteristics and stress characteristics such as the thermal stress and
Haiwang Li, Dawei Zhang, Ruquan You, Yifan Zou, Song Liu   +4 more
doaj   +1 more source

Film Cooling from a Single Row of Compound AngleHoles at High Blowing Ratios [PDF]

International Journal of Rotating Machinery, 1996
Experimental results are presented which describe the development and structure of flow downstream of a single row of holes with compound angle orientations producing film cooling at high blowing ratios. This film cooling configuration is important because similar arrangements are frequently employed on the first stage of rotating blades of operating ...
Phillip M. Ligrani, Joon Sik Lee
openaire   +2 more sources