September 2023

In aircraft design and engineering, “heat energy” (Q) represents the energy transferred between a system and its surroundings as a result of a temperature difference. Heat energy is a form of energy associated with the random motion of molecules within a substance. The formula for calculating heat energy can be defined as: Heat Energy (Q) […]

In aircraft design and engineering, “specific heat capacity” (often denoted as c or cp) is a thermodynamic property of a substance that represents the amount of heat energy required to raise the temperature of a unit mass of that substance by one degree Celsius (or one Kelvin). Specific heat capacity is typically measured at constant

In aircraft design and engineering, the “ideal isentropic work done” refers to the work done by a compressor or a turbine operating under ideal and reversible conditions, often referred to as isentropic conditions. This work is associated with the compression or expansion of a fluid (such as air) without losses due to heat exchange or

In aircraft design and engineering, “specific volume” is a property of a fluid (such as air) that represents the volume occupied by one unit of mass of that fluid. It’s essentially the reciprocal of density and provides information about how much space a given mass of the fluid occupies. The formula for calculating specific volume

In aircraft design and engineering, “internal energy” refers to the total energy contained within a fluid (such as air) due to its molecular motion and intermolecular forces. It’s a fundamental thermodynamic property that contributes to the overall energy state of the fluid. The formula for calculating the internal energy (U) can be defined as: U

In aircraft design and engineering, “initial enthalpy” refers to the enthalpy of a fluid (such as air) before a specific process or change, such as compression, heating, or expansion. Enthalpy is a thermodynamic property that combines the internal energy of the fluid with the product of its pressure and volume. The formula for calculating the

In aircraft design and engineering, “final enthalpy” refers to the enthalpy of a fluid (such as air) after a specific process or change, such as compression, heating, or expansion. Enthalpy is a thermodynamic property that combines the internal energy of the fluid with the product of its pressure and volume. The formula for calculating the

In aircraft design and engineering, “change in enthalpy” (ΔH) represents the difference in the total energy per unit mass of a fluid (such as air) before and after a process, like compression or heating. Enthalpy is a thermodynamic property that combines the internal energy of a fluid with the product of its pressure and volume.

The actual work done by a compressor in aircraft design represents the real work or energy expended by the compressor as it compresses air or another fluid. This parameter is crucial for assessing the compressor’s performance and efficiency. The formula for calculating the actual work done by a compressor can be defined as: Actual Work

In aircraft design and engineering, adiabatic efficiency (η) is a parameter used to quantify how efficiently a compressor (such as an axial flow compressor in a gas turbine engine) accomplishes the compression process without heat exchange with the surroundings. Adiabatic efficiency is expressed as a percentage and represents the ratio of the actual work done