scholarly journals Aerodynamic performance enhancement of missile using numerical techniques

2020 ◽  
Vol 1706 ◽  
pp. 012222
Author(s):  
Raghuvaran Divakaran ◽  
Nathan Barretto ◽  
G Srinivas
Keyword(s):  
Performance Enhancement ◽  
Aerodynamic Performance ◽  
Numerical Techniques

scholarly journals Aerodynamic Performance Enhancement of Electromagnetic Gun Projectile Using Numerical Techniques

2021 ◽  
Vol 80 (2) ◽  
pp. 136-152
Author(s):  
Fariha Rahman ◽  
G Srinivas
Keyword(s):  
Mach Number ◽  
Cfd Simulation ◽  
Performance Enhancement ◽  
Numerical Test ◽  
Turbulence Models ◽  
Numerical Approach ◽  
Aerodynamic Characteristics ◽  
Aerodynamic Performance ◽  
Navier Stokes ◽  
Numerical Techniques

The unique study named aerodynamic performance enhancement of electromagnetic (EM) gun Projectile using numerical techniques is adopted to determine the better understanding of its aerodynamic characteristics. The earlier studies on EM gun projectile could explore its aerodynamic stability during flight whereas this unique research explains the enhancement of aerodynamic performance of EM gun projectile using numerical techniques. By using the Navier-Stokes numerical approach for a steady-state compressible flow, the Computational Fluid Dynamics (CFD) simulation of density, pressure, and temperature flow contours of the EM gun projectile flow field at different Mach number- 5 to 10 with an increment of 0.5 at zero angle of attack (AOA) have been analyzed. The results show an excellent agreement for the Mach numbers 5, 6, and 7. Moreover, to ensure accurate knowledge of the aerodynamic performance of EM gun projectile the numerical test is conducted several times using different turbulence models and differing the grid element sizes for Mach number 7. The results prove that at hypersonic speed the EM gun projectile performs in a much better way at Mach number 7. This best performance is analyzed by using the Spalart Allmaras (SA) turbulence model for grid size 5.4169e-03m. This work will help the researchers to do further improvements in EM gun projectile aerodynamic behaviors and also can be useful for military purposes.

Analysis of Wind Field Fan Based on Performance Enhancement Method

2014 ◽  
Vol 986-987 ◽  
pp. 235-238
Author(s):  
Xiao Long Tan ◽  
Jia Zhou ◽  
Wen Bin Wang
Keyword(s):  
Wind Speed ◽  
Wind Turbines ◽  
Performance Enhancement ◽  
Aerodynamic Performance ◽  
Wind Load ◽  
Wind Speeds ◽  
Enhancement Method ◽  
Changes Over Time ◽  
Load Simulation ◽  
Single Constant

For the simulation of wind turbine, the wind speed is extremely important parameters and indicators to measure the output power of the unit is the wind load. Therefore, in the airflow dynamics and simulation of wind loads before establishing an accurate wind speed model is crucial. At present, the application for wind turbines COMSOL fan, fan blades and wind load simulation field, the extremely important wind speed model is not perfect, most of the research is confined to a single constant wind speed, wind speed virtually ignored the magnitude and direction of change, on changes over time and space at the same time is one of the few studies of wind, so find a way to accurately describe the range of wind speeds, and can be combined well with COMSOL method can greatly improve the aerodynamic performance of wind turbines the overall level of .

Evaluation of aerodynamic performance enhancement of Risø_B1 airfoil with an optimized cavity by PIV measurement

2020 ◽  
Vol 23 (4) ◽  
pp. 591-603
Author(s):  
Mahdi Nili-Ahmadabadi ◽  
Omid Nematollahi ◽  
Mostafa Fatehi ◽  
Dae Seung Cho ◽  
Kyung Chun Kim
Keyword(s):  
Performance Enhancement ◽  
Aerodynamic Performance ◽  
Piv Measurement

scholarly journals Rotor performance enhancement through blade surging

2019 ◽  
Vol 11 ◽  
pp. 175682931984427
Author(s):  
T Bensebaa ◽  
T Jardin ◽  
S Prothin ◽  
N Doue
Keyword(s):  
Large Scale ◽  
Performance Enhancement ◽  
Leading Edge ◽  
Aerodynamic Performance ◽  
Short Paper ◽  
Optimal Frequency ◽  
Leading Edge Vortex ◽  
Disk Plane ◽  
Edge Vortex ◽  
Rotor Disk

This short paper introduces a new concept of rotor where the blades undergo a periodic surging motion in the rotor disk plane. It is shown that the unsteady actuation induces aerodynamic phenomenon that can enhance both rotor thrust and efficiency, depending on the amplitude and frequency of actuation. In particular, the increase in aerodynamic performance is found to correlate with the development of a large scale leading edge vortex. Accordingly, the optimal frequency is found to correlate with the formation time of this vortex.

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