Numerical study of the effects of suction and blowing on an aircraft wing
(2024) MVKM05 20241Department of Energy Sciences
- Abstract
- Lift force is a crucial factor in aviation, particularly during landing phases where maintaining optimal lift is essential for safety and performance. This thesis explores the effectiveness of suction and blowing control methods in enhancing aerodynamic performance and increasing lift force. By investigating these control techniques, the study aims to provide recommendations for practical applications to improve lift characteristics.
The research focuses on the boundary layer (BL) effects on specific airfoils under suction and blowing control. The objective is to identify suitable parameters for implementing these controls to maximize aerodynamic efficiency. A two-dimensional (2D) computational fluid dynamics (CFD) model is employed to... (More) - Lift force is a crucial factor in aviation, particularly during landing phases where maintaining optimal lift is essential for safety and performance. This thesis explores the effectiveness of suction and blowing control methods in enhancing aerodynamic performance and increasing lift force. By investigating these control techniques, the study aims to provide recommendations for practical applications to improve lift characteristics.
The research focuses on the boundary layer (BL) effects on specific airfoils under suction and blowing control. The objective is to identify suitable parameters for implementing these controls to maximize aerodynamic efficiency. A two-dimensional (2D) computational fluid dynamics (CFD) model is employed to analyze the impact of suction and blowing on NACA 0012 and Redwing airfoils, the latter from Blackwing AB Sweden.
The results demonstrate that for the NACA 0012 airfoil, perpendicular suction significantly enhances the lift coefficient, with the most notable improvement observed at a suction jet location of 10% of the chord length and a suction amplitude of 0.5. In contrast, perpendicular blowing on the NACA 0012 airfoil does not yield any significant aerodynamic benefits. For the Redwing airfoil, the optimal suction jet locations are identified at 10% and 30% of the chord length with the flap wing at 0 degrees. Additionally, it is found that the jet width has minimal impact on the overall performance. (Less) - Popular Abstract
- During the landing phase of an aircraft, the speed of the aircraft must be slowed down for safety reasons. Whereas the lift force must be high enough to keep the aircraft in the air. To achieve this, the aircraft can be tilted to increase the angle between its wing and the air flow. The higher the angle, the higher lift force and slower aircraft’s speed. However, too high an angle will cause separation in the flow and greatly decrease the lift. This thesis aims to investigate the suction and blowing method to achieve higher lift.
Suction means removing the air from the flow. It is the same as putting a vacuum on the wing. On the other hand, blowing will move the air away from the wing. The subjects of this study are perpendicular... (More) - During the landing phase of an aircraft, the speed of the aircraft must be slowed down for safety reasons. Whereas the lift force must be high enough to keep the aircraft in the air. To achieve this, the aircraft can be tilted to increase the angle between its wing and the air flow. The higher the angle, the higher lift force and slower aircraft’s speed. However, too high an angle will cause separation in the flow and greatly decrease the lift. This thesis aims to investigate the suction and blowing method to achieve higher lift.
Suction means removing the air from the flow. It is the same as putting a vacuum on the wing. On the other hand, blowing will move the air away from the wing. The subjects of this study are perpendicular suction and perpendicular blowing. Using two-dimensional fluid dynamics simulation, this study finds that suction is beneficial, and blowing is disadvantageous.
More suction power yields more lift force. One suction jet at the front of the wing is the most efficient setting. Two suction jets will have better lift but not as efficient as one jet. Although setting the suction jet towards the back of the wing can increase the lift, the risk and effects of separation are much higher. Therefore, setting is suction jet towards the front of the wing is better in general. The width of suction jet does not affect the lift of aircraft.
Using the findings from this study, designers and engineers can consider applying suction jets on their aircraft. Regarding science contribution, this study helps understand how suction and blowing work on one section of an aircraft wing.
Nevertheless, these results are two-dimensional simulations. This cannot completely describe the real-world behavior of the aircraft wing. Three-dimensional simulations should be used to achieve more accurate results. Moreover, more settings of suction should be simulated to find more optimal results.
There were a lot of human errors while working with the software programme. This wasted a lot of time and negatively affected the results. To overcome this, basic coding and programming should be used. And simulations should be run on the server (cluster) instead of local computers, which is much faster. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9167637
- author
- Nguyen, Ngoc Thien LU
- supervisor
- organization
- course
- MVKM05 20241
- year
- 2024
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- CFD, suction, blowing, airfoil
- report number
- ISRN LUTMDN/TMHP-24/5570-SE
- ISSN
- 0282-1990
- language
- English
- id
- 9167637
- date added to LUP
- 2024-06-24 13:15:46
- date last changed
- 2024-06-24 13:15:46
@misc{9167637,
abstract = {{Lift force is a crucial factor in aviation, particularly during landing phases where maintaining optimal lift is essential for safety and performance. This thesis explores the effectiveness of suction and blowing control methods in enhancing aerodynamic performance and increasing lift force. By investigating these control techniques, the study aims to provide recommendations for practical applications to improve lift characteristics.
The research focuses on the boundary layer (BL) effects on specific airfoils under suction and blowing control. The objective is to identify suitable parameters for implementing these controls to maximize aerodynamic efficiency. A two-dimensional (2D) computational fluid dynamics (CFD) model is employed to analyze the impact of suction and blowing on NACA 0012 and Redwing airfoils, the latter from Blackwing AB Sweden.
The results demonstrate that for the NACA 0012 airfoil, perpendicular suction significantly enhances the lift coefficient, with the most notable improvement observed at a suction jet location of 10% of the chord length and a suction amplitude of 0.5. In contrast, perpendicular blowing on the NACA 0012 airfoil does not yield any significant aerodynamic benefits. For the Redwing airfoil, the optimal suction jet locations are identified at 10% and 30% of the chord length with the flap wing at 0 degrees. Additionally, it is found that the jet width has minimal impact on the overall performance.}},
author = {{Nguyen, Ngoc Thien}},
issn = {{0282-1990}},
language = {{eng}},
note = {{Student Paper}},
title = {{Numerical study of the effects of suction and blowing on an aircraft wing}},
year = {{2024}},
}