Drag coefficient - Wikipedia
In fluid dynamics, the drag coefficient (commonly denoted as: , or ) 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 in which a lower drag coefficient indicates the object will have less aerodynamic or hydrodynamic drag.
Drag Coefficient - The Engineering ToolBox
The drag coefficient quantifies the drag or resistance of an object in a fluid environment. Any object moving through a fluid experiences drag - the net force in the direction of flow due to pressure and shear stress forces on the surface of the object.
Automobile drag coefficient - Wikipedia
Drag is a force that acts parallel to and in the same direction as the airflow. The drag coefficient of an automobile measures the way the automobile passes through the surrounding air. When automobile companies design a new vehicle they take into consideration the automobile drag coefficient in addition to the other performance characteristics.
Drag Coefficient | Glenn Research Center | NASA
2024年7月19日 · This equation gives us a way to determine a value for the drag coefficient. In a controlled environment like a wind tunnel we can set the velocity, density, and area and measure the drag produced. Through division we arrive at a value for the drag coefficient.
Shape Effects on Drag | Glenn Research Center | NASA
2023年11月20日 · Values of the Drag Coefficient. This page shows some typical values of the drag coefficient for a variety of shapes. The values shown here were determined experimentally by placing models in a wind tunnel and measuring the amount of drag, the tunnel conditions of velocity and density, and the reference area of the model.
Drag Coefficient - Definition, Formula, Calculation, Uses, FAQs
When an object moves through a fluid, then to compute its resistance, the coefficient used is known as the Drag coefficient, denoted by C d. The coefficient of drag is dimensionless, which is helpful in calculating aerodynamic drag and the impact of shape, inclination and conditions of flow in aerodynamics.
Drag Coefficient Units - EngineerExcel
Drag Coefficient Values. Given the area and Reynolds number, here are some of the estimated values of drag coefficients for flow over simple two-dimensional and three-dimensional bodies, summarized in the following tables.
8.6: Drag Forces in Fluids - Physics LibreTexts
2022年7月20日 · The coefficient \(C_{D}\) is called the drag coefficient, a dimensionless number that is a property of the object. Table 8.1 lists the drag coefficient for some simple shapes, (each of these objects has a Reynolds number of order 104 ). The above model for air drag does not extend to all fluids.
Drag Equation Calculator
2024年7月16日 · How can I calculate the drag coefficient of an object? You can compute the drag coefficient using the drag force equation. To do so, perform the following steps: Take the fluid density where the object is moving. Multiply it by the reference cross-sectional area and by the square of the relative velocity of your object.
Drag Coefficient - an overview | ScienceDirect Topics
Drag coefficient is due to friction, pressure, and induced drag. The friction component is associated to the boundary layer development, its magnitude depends on the characteristics of the fluid (i.e., viscosity), and the Reynolds number; hence, a body immersed in a nonviscous fluid experiences no drag because it has no friction.
- 某些结果已被删除