Author name: Arshad Arif A.S

The Nusselt number (Nu) is a dimensionless number used in heat transfer calculations. Its formula depends on the specific situation, but a common formula for forced convection over a flat plate is: Where: Nu is the Nusselt number, ℎh is the convective heat transfer coefficient, L is the characteristic length (typically the length of the […]

The Froude number (Fr) is calculated as the ratio of the velocity of a fluid to the square root of the product of the acceleration due to gravity (g) and the characteristic length scale (L) of the system. The formula is: Where: V is the velocity of the fluid, g is the acceleration due to

Heat flux is the rate of heat transfer per unit area. It represents the amount of heat energy transferred through a surface per unit time. Mathematically, it is expressed as the amount of heat transferred per unit time and per unit area, Where: q = heat flux (in watts per square meter, W/m²) ΔQ = amount

The heat capacity ratio, also known as the adiabatic index or specific heat ratio, defines the ratio of the specific heat at constant pressure (Cp​) to the specific heat at constant volume (Cv​).

The design of turbofan engines involves complex calculations and considerations, but here’s a simplified formula for the thrust produced by a turbofan engine: Where: F is the thrust produced by the engine. mair​ is the mass flow rate of air entering the engine. mfuel​ is the mass flow rate of fuel entering the engine. vexit​

The bypass ratio (BPR) is typically calculated as the ratio of the mass flow rate of air passing through the bypass duct to the mass flow rate of air passing through the engine’s core. Mathematically, it can be expressed as: Where: bypass​ is the mass flow rate through the bypass duct. Core​ is the mass

The formula for engine bleed air typically involves multiple variables and depends on the specific aircraft engine and system configuration. However, a simplified formula for calculating engine bleed air flow rate can be expressed as: Where: Engine Mass Flow Rate: The mass flow rate of air entering the engine, typically measured in pounds per hour

The formula for reverse thrust depends on various factors such as aircraft type, engine specifications, and environmental conditions. However, a simplified formula for calculating reverse thrust force can be expressed as:

The formula for engine cooling airflow can vary depending on factors such as the engine size, design, and cooling system configuration. However, a simplified formula commonly used to estimate airflow for engine cooling is: Where: Heat Dissipation Rate is the amount of heat generated by the engine (in watts or BTU/hr). Air Specific Heat is

Turboprop engines are a type of gas turbine engine used primarily in aircraft propulsion. They are designed to convert the energy from burning fuel into mechanical energy to drive a propeller. Where: P is the power output of the engine, η is the overall efficiency of the engine, ˙m˙ is the mass flow rate of