Explain the terms; sheardrag, pressure drag and total drag
Answers
sheardrag:
pressure drag. The force on an object that resists its motion through a fluid is called drag . When the fluid is a gas like air, it is called aerodynamic drag or air resistance . ... In somewhat technical language, a fluid is any material that can't resist a shear force for any appreciable length of time.
pressure:
pressure drag. pressure drag. noun. Drag caused by increased pressure on the front and decreased pressure on the rear of an object moving through a fluid medium such as air or water or of a stationary object around which the medium passes.
total drag
Total drag is the sum of all forces working parallel to but opposed to thrust. Although there are numerous of factors affecting total drag it is common to subdivide these factors into 2 main factors, namely: - induced drag (drag which is associated with the production of lift)
Explanation:
A tangential stress caused by fluid viscosity and taking place along a boundary of a flow in the tangential direction of local motion. Also known as shear drag.
Drag caused by increased pressure on the front and decreased pressure on the rear of an object moving through a fluid medium such as air or water or of a stationary object around which the medium passes.
Total drag is the sum of all forces working parallel to but opposed to thrust. Although there are numerous of factors affecting total drag it is common to subdivide these factors into 2 main factors, namely:
- induced drag (drag which is associated with the production of lift)
- parasite drag (drag which is not associated with lift production but mainly depends on aircraft shape or skin friction for example and is also known as zero lift drag)
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