The Knudsen number, often denoted as Kn, is a dimensionless quantity used in fluid dynamics and gas dynamics to characterize the relative importance of molecular mean free path length to a characteristic length scale of the system. It is named after the Danish physicist Martin Knudsen. The Knudsen number is defined as the ratio of […]
The pitching moment coefficient (Cm​) is a dimensionless coefficient used in aerodynamics to describe the pitching moment experienced by an airfoil. Positive values of Cm​ indicate a nose-up pitching moment, while negative values indicate a nose-down pitching moment. The formula to calculate Pitching moment coefficient as follows: Where: M is the pitching moment acting on
Pitching moment coefficient (Cm) Calculator Read More »
Jet Engine Specific Fuel Consumption of a jet engine is a measure of the amount of fuel consumed per unit of thrust produced. SFC is the Specific Fuel Consumption, m˙fuel​ is the mass flow rate of fuel, T is the thrust produced by the jet engine.
Jet Engine Specific Fuel Consumption Calculator Read More »
Jet Engine Bypass Ratio is a crucial parameter in the design of jet engines. It represents the ratio of the mass of air that bypasses the engine core BPR is the Bypass Ratio. m˙air​ is the mass flow rate of bypass air. m˙fuel​ is the mass flow rate of fuel.
Jet Engine Bypass Ratio Calculator Read More »
Rule of mixtures is a weighted mean used to predict various properties of a composite material. The formula is given by: Where: Ecomposite​ is the Young’s Modulus of the composite material. Vf​ is the volume fraction of the reinforcement. Ereinforcement​ is the Young’s Modulus of the reinforcement material. Vm​ is the volume fraction of the
Rule Of Mixtures Calculator Read More »
Orbital velocity Calculator refers to the velocity required for an object to maintain a stable orbit around another body, such as a planet or a star. It depends on the mass of the body being orbited and the distance from the center of that body. Where: v is the orbital velocity, G is the gravitational
Orbital velocity Calculator Read More »
The standard rate turn angular velocity is the rate at which an aircraft must rotate around its center of gravity to achieve a standard rate turn ωstandard​: Angular velocity for a standard rate turn g: Acceleration due to gravity (approximately 9.81 m/s²) V: Velocity of the aircraft
Standard Rate Turn Angular Velocity Calculator Read More »
The velocity ratio in a jet engine is commonly expressed as the pressure ratio, which is the ratio of the total pressure at the exit of the combustion chamber (pt3​) to the total pressure at the compressor exit (pt2​). pt3​ is the total pressure at the exit of the combustion chamber pt2​ is the
Velocity Ratio in a Jet Engine Calculator Read More »
In pressure-fed propulsion, propellant pushes into the combustion chamber from a tank using pressure, not pumping. It’s simpler and more reliable than pump-fed systems but typically has lower performance. Where: Ë™mË™ is the mass flow rate of propellant Ve​ is the effective exhaust velocity Pe​ is the pressure at the exit of the nozzle P0​
Pressure-fed propulsion Calculator Read More »
Volumetric strain is a measure of the change in volume of a material subjected to deformation, typically due to mechanical stress. It is defined as the change in volume (ΔV) per unit original volume (V), and it is dimensionless. The formula for volumetric strain (ϵv​) is: change in volume (ΔV) unit original volume (V) SI
Volumetric Strain Calculator Read More »
