A Comprehensive Review and Derivation of Coefficient of Lift (C_L) Calculation Formulas: Insights from Classical and Modern Aerodynamic Theories

A Comprehensive Review and Derivation of Coefficient of Lift ( ) Calculation Formulas: Insights from Classical and Modern Aerodynamic Theories

Abdul Mateen Manzoor Ahmed, MD Mubeenuddin Siddiqui

Abstract

This paper presents a comprehensive review and derivation of various formulas used to calculate lift in aerodynamic applications, synthesizing classical and modern theories from existing literature. It investigates the fundamental mathematical theories of coefficients of lift and various methods for calculating it, using Navier-Stokes equations, Euler's inviscid flow equations, and the Kutta-Joukowski theorem to explore how different theories explain and predict lift generation. By examining research papers on subsonic and supersonic airflows, thin airfoil theory, and computational fluid dynamics (CFD), we derive key equations governing lift production. The study highlights the impact of variables such as angle of attack, Reynolds number, and airfoil geometry on lift, offering a comparison of traditional analytical methods and contemporary computational techniques. Additionally, the paper addresses common misconceptions about lift, particularly the Equal Transit Time theory and Coanda Effect, while proposing a comprehensive analysis of the most accurate and effective approaches for calculating and optimizing lift. The findings provide a deeper understanding of the theoretical foundations of lift, supporting further advancements in aerodynamic research and engineering applications.

Keywords: Lift Calculations, Airfoil Theory, Lift Coefficient, Classical Aerodynamics, Modern Lift Formulas.