coefficient of drag
11drag — [1] To accelerate a vehicle from a standing start, over a course one fourth mile in length. Also called drag racing. [2] Used by some drivers when referring to challenging another driver to an acceleration race. [3] Air resistance. See… …
12drag coefficient — Aerodynamics. the ratio of the drag on a body moving through air to the product of the velocity and surface area of the body. Also called coefficient of drag. * * * …
13drag — /drag/, v., dragged, dragging, n., adj. v.t. 1. to draw with force, effort, or difficulty; pull heavily or slowly along; haul; trail: They dragged the carpet out of the house. 2. to search with a drag, grapnel, or the like: They dragged the lake… …
14Drag coefficient — In fluid dynamics, the drag coefficient (commonly denoted as: cd, cx or cw) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment such as air or water. It is used in the drag equation,… …
15Drag count — A drag count is a single unit of drag as defined by aerospace engineers. Drag is generally computed using the equation: Where: ρ is the air density v is the current airspeed Cd is the drag coefficient (a dimensionless constant, usually on the… …
16Drag — Contents 1 In science and technology 2 In arts, performance arts and entertainment 3 Other uses …
17drag coefficient — i. Nondimensional coefficient equal to total drag divided by 1/2ρV2 S, where ρ is density, V is indicated air speed, and S is surface area of the body. ii. A coefficient representing the drag on a given airfoil or other body or a coefficient… …
18drag coefficient — (Cd) A number used in calculating the aerodynamic drag acting on a vehicle. The drag coefficient is a function of factors like the shape of the vehicle, airflow through the vehicle for ventilation and cooling. The number is determined in a wind… …
19Drag divergence Mach number — The drag divergence Mach number (not to be confused with critical Mach number) is the Mach number at which the aerodynamic drag on an airfoil or airframe begins to increase rapidly as the Mach number continues to increase[1]. This increase can… …
20Drag crisis — In fluid dynamics, drag crisis is a phenomenon in which drag coefficient drops off suddenly as Reynolds number increases. This has been well studied for round bodies like spheres and cylinders. The drag coefficient of a sphere will change rapidly …
