*민* 스토어

*민*

개인인증

팔로워0 팔로우

소개

등록된 소개글이 없습니다.

전문분야 등록된 전문분야가 없습니다.

판매자 정보

학교정보

입력된 정보가 없습니다.

직장정보

입력된 정보가 없습니다.

자격증

입력된 정보가 없습니다.

판매지수

판매중 자료수

1개
전체 판매량

3개
최근 3개월 판매량

0개
자료후기 점수

-
자료문의 응답률

-

전체자료 1개

항공기 날개 골의 종류 및 항공기에 작용하는 힘의 종류를 그림과 각각의 특징에 대하여 영문으로 간단히 소개하시오.

I. InroductionOne of the most important forces on an aircraft is lift and drag. Let's look at the wing goal and the force generated by the aircraft, which play the most important role in generating lift.II. Body1. airfoil section◎Airfoil: A surface designed to obtain a useful reaction from the air through which it moves. Such surfaces as a wing, a propeller blade, vertical and horizontal stabilizers are airfoils.◎Angle of attack: the acute angle between the chord line of the airfoil and a line representing the relative wind.◎Burble point: The first sign of separation and uneven flow of air that occurs on the upper camber of an airfoil, caused by too great an angle of attack.◎Camber: The rise of the curve of an airfoil section from its chord line.◎Center of pressure: The point on the chord line of an airfoil section which is at the intersection of the chord and the line of action of the combined force of lift and drag.◎Upper surface: The suction surface (a.k.a. upper surface) is general that has maximum curvature (minimum radius).◎Trailing edge: It is defined similarly as the point of maximum curvature at the rear of the airfoil.◎Chord line: It is the straight line connecting leading and trailing edges. The chord length, or simply chord, {displaystyle c}c, is the length of the chord line. That is the reference dimension of the airfoil section.2. Airfoil Type◎Type of airfoil based on shape●Symmetrical Airfoil: It is distinguished by having identical upper and lower surfaces. [Figure 2-11] The mean camber line and chord line are the same on a symmetrical airfoil, and it produces no lift at zero AOA. Most light helicopters incorporate symmetrical airfoils in the main rotor blades.●Nonsymmetrical Airfoil (Cambered): It has different upper and lower surfaces, with a greater curvature of the airfoil above the chord line than below. [Figure 2-11] The mean camber line and chord line are different. The nonsymmetrical airfoil design can produce useful lift at zero AOA. A nonsuction costs.◎Type of airfoil based on NACA●NACA 4 Series: NACA 4 series maximum camber the position of the chord length, located behind the 40 percent of the airfoil as used usually very low speed, the aircraft's wing airfoil. When I was to appear, naca xxxx said. At this time, x appear on each seat is different. The first seat is up to the size of the camber. The second digit is next to the position of the maximum camber. Finally, The last seat is the maximum thickness.Ex) NACA 24152: Maximum camber chord of the 2 %.4: That the position of the maximum camber leading edge chord from behind 40 percent.15: Maximum thickness is 15 percent of the chord.●NACA 5 Series: NACA 5 series is NACA 4 series to develop. Airfoil that you use a lot to the medium and large propeller is the airfoil. NACA xxxxx said. What it means to each of the first place was the size of the maximum camber. Second, the third position is the position of the maximum camber. Finally, the fourth, fifth position is the maxar airfoil Internet-as maintain the flow of the front. if a smaller aoa also called "iaminar flow airfoil", a different name. "NACA 6 Serise" expressed "NACA xxxxx".Ex) NACA6: Tell me that 6 serise the airfoil .5: A is zero, the situation comes in at least 50 % of the pressure is chord.1: The width of the drag bucket up around the Design lift coefficient +, - 0.1.2: Design lift coefficient is more than 0.2.15: The maximum thickness is 15% of the Chord●Supersonic airfoilThe supersonic airfoil leading edge the spiky shape with a knife. The supersonic airfoil wave drag made to reduce the airfoil. Supersonic airfoil is represented by "NACA-XS (xx) (xx) - (xx) (xx)".Ex) NACA - 1S (50) (03) - (50) (03)1: Serial number 1 wedge, 2 arcuateS: Supersonic wing을 나타냄50: The maximum thickness position of the upper surface is in the 50% of the chord.03: Maximum thickness of the top is 0.03 % of the chord50: The maximum thickness position of the lower surface is in the 50% of the chord.03: The undersided is fast and the pressure is low. Characterized the underside of the air speed slow, the pressure is higher than the upper surface. At this time, due to the nature of the air flows from the top to the bottom. The lift will occur due to this phenomenon.◎Drag: It is the force that prevents you want to move forward. The drag is greater fuel consumption of the aircraft getting worse, the crowd will go on the aircraft fuselage. Therefore, drag force is smaller the better.◎Thrust: It is the force that overcomes the drag of aircraft is moving forward.◎Gravity: It is the weight of the aircraft. Gravity is greater the effect on the aircraft safety.III. ConclusionI think the airfoil and the force acting on the aircraft are fundamental to the aircraft. I am happy and helpful to have a deeper understanding through this researching. If I have time next time, I would like to do a similar research and study more about other parts of the aircraft.IV. Reference material네이버 사전위키백과Airfoils - Airfoil tyrial

공학/기술| 2020.10.15| 7페이지| 1,000원| 조회(205)

항공영어, 항공기에 작용하는 힘의 종류, 항공기 날개 골의 종류

미리보기

닫기