The influence of Krueger flap geometric parameters on the lift of an aircraft wing

Abstract

The front wing mechanization is used in lots of passenger aircrafts. Since it plays an important role during take-offs and landings, aerodynamics has the task of optimizing it. In this paper is examined one of the variants of mechanization of the leading edge of the wing, the Kruger's flap. The Kruger's flap geometric parameters were defined and then changed. They include: the size of the gap between the profile and the flap, the flap adjustment angle and location angle. Investigation of the geometric parameters of the Kruger's flap and their effect on the lifting force of the wing allow us to obtain the optimal geometry of the flap, which will create the largest lifting force among all the variants. The purpose of this master's thesis is to study the influence of the geometric parameters of the Kruger's flap on the lifting force of the wing of the aircraft, namely: - Influence of the adjustment angle of the Kruger's flap on the lifting force and the resistance force of the aircraft; - Influence of the gap between the Kruger's flap and the airplane's profile on the lifting force and the resistance force of the aircraft; - Influence of the Kruger's flap placement on the lifting force and resistance force of the aircraft. The object of the study is the process of airflow over the Kruger's flap. The subjects of the study are the aerodynamic characteristics of the aircraft with the Kruger's flap. The scientific novelty of the results is obtained due to the studies that have not yet been conducted, that allow us to make recommendations for improvement of the aerodynamic characteristics of the aircraft, and save money for aerodynamic performance researches.