Back سحب طفيلي Arabic Parazit sürütlənmə Azerbaijani Profilwiderstand German Resistencia parásita Spanish Parasitaire weerstand Dutch Opór interferencyjny Polish بې لکۍ الوتکه Pashto/Pushto Arrasto parasita Portuguese Parazit sürükleme Turkish 寄生阻力 Chinese
Parasitic drag, also known as profile drag,[1]: 254 [2]: 256 is a type of aerodynamic drag that acts on any object when the object is moving through a fluid. Parasitic drag is defined as the combination of form drag and skin friction drag.[3][1]: 641–642 [4]: 19
It is named as such because it is not useful, in contrast with lift-induced drag which is created when an airfoil generates lift. All objects experience parasitic drag, regardless of whether they generate lift. Parasitic drag comprises all types of drag except lift-induced drag, and the total drag on an aircraft or other object which generates lift is the sum of parasitic drag and lift-induced drag.[5]
- ^ a b Anderson, John D. Jr. (1991). Fundamentals of aerodynamics (2nd ed.). New York: McGraw-Hill. ISBN 0-07-001679-8.
- ^ Anderson, John D. Jr. (2016). Introduction to flight (Eighth ed.). New York, NY: McGraw Hill Education. p. 242. ISBN 978-0-07-802767-3.
- ^ Clancy, L.J. (1975). Aerodynamics, Sub-section 5.9. Pitman Publishing. ISBN 0 273 01120 0
- ^ Gowree, Erwin Ricky (20 May 2014). Influence of Attachment Line Flow on Form Drag (doctoral). Retrieved 22 March 2022.
- ^ Pilot's Handbook of Aeronautical Knowledge (PDF). FAA. p. Chapter 5, Aerodynamics of flight.
The first is called parasite because it in no way functions to aid flight, while the second, induced drag, is a result of an airfoil developing lift.