2011年8月17日 · In summary, the conversation discusses calculating skin friction drag on a truck and comparing it to pressure drag. The equation for skin friction is provided, but the coefficient …

2018年1月21日 · In summary, thin airfoil theory neglects both viscosity and finite span effects, resulting in a prediction of zero drag on a subsonic airfoil. This is known as D'Alembert's …

2010年6月13日 · In summary, profile drag and pressure drag are both sources of drag in aerodynamics. Profile drag is caused by the separation of the boundary layer from the trailing …

2012年7月12日 · On all planes, drag is a result of a combination of pressure drag and skin friction drag (and at increased Mach numbers, wave drag). Planes have smooth forms behind them to …

2012年10月22日 · than 5 x 10 5 will most likely be turbulent. The Reynolds number is important for determining drag as we can use it to calculate the length of the laminar and turbulent flow …

2012年4月7日 · So for an inviscid irrotational flow, there will be no pressure drag regardless of body shape, as the integral of the pressure distribution on the surface cancels out. Now when …

2005年11月19日 · There are a number of drag coefficients, each of them relating to the specific drag that you're calculating at the time. Scramjet posted the correct equation for calculating …

2011年4月16日 · I watch a lot of mythbusters and they constantly talk about the low pressure zone behind a car. I'm confused how does that create drag?

2016年10月20日 · In summary, drag comes from an object having to drag a volume of air behind it rather than from skin friction with air molecules. The relationship between air temperature, …

2021年8月12日 · If skin friction viscous drag were a minor contributor, the drag would be diminished by dragging the missile out into a longer and thinner needle, with less cross-section …