TAILIEUCHUNG - Aircraft Design - Systhesis anh Analysis 2008 Part 7

Tham khảo tài liệu 'aircraft design - systhesis anh analysis 2008 part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | High-Lift Systems Outline of this Chapter The chapter is divided into four sections. The introduction describes the motivation for high lift systems and the basic concepts underlying flap and slat systems. The second section deals with the basic ideas behind high lift performance prediction and the third section details the specific method used here for estimating CLmax. Some discussion on maximum lift prediction for supersonic aircraft concludes the chapter. Introduction and Basic Concepts High Lift Prediction General Approach High Lift Prediction Specific Conceptual Design Approach Estimating Maximum Lift for Supersonic Transport Aircraft Wing-Body Cl Calculation Page Figure 2. The triple-slotted flap system used on a 737. Figure 3 shows a double-slotted flap and slat system a 4-element airfoil . Here some of the increase in CLmax is associated with an increase in chord length Fowler motion provided by motion along the flap track or by a rotation axis that is located below the wing. Figure 3. Double-Slotted Flap and Slat System Modern high lift systems are often quite complex with many elements and multi-bar linkages. Here is a double-slotted flap system as used on a DC-8. For some time Douglas resisted the temptation to use tracks and resorted to such elaborate 4-bar linkages. The idea was that these would be more reliable. In practice it seems both schemes are very reliable. Current practice has been to simplify the flap system and double or even single slotted systems are often preferred. Figure 4. Motion of a Double-Slotted Flap Flap Aerodynamics Flaps change the airfoil pressure distribution increasing the camber of the airfoil and allowing more of the lift to be carried over the rear portion of the section. If the maximum lift coefficient is controlled by the height of the forward suction peak the flap permits more lift for a given peak height. Flaps also increase the lift at a given angle of attack important for aircraft which are constrained by ground .

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.