Abstract
The present work investigates the influence of ignition delay on the diesel engine performance. A theoretical model is used via a program written by MATLAB, to compute the ignition delay in (ms) for a diesel engine at identical operation conditions. The ignition delay in the diesel engines using different reference diesel fuels with different cetane numbers of 40 and 50 was investigated. Effect of the operating conditions such as the engine compression ratios, intake pressures and temperatures on the ignition delay, was investigated. Influences of engine speed changes on ignition delay at low, moderate and high conditions were represented. Comparisons between obtained results for the two types of the used fuels were also represented. The results show that the ignition delay decreases with increasing the engine speed, the engine compression ratio, cetane number, intake pressure and temperature. The compression ratio causes remarkable reduction in ignition delay.
Highlights
Strenuous exploration is continuously offered for the advancement of wind turbine technology
The present work is based on the comparative study between “Blade-ElementMomentum” (BEM) analysis and “Computational-Fluid-Dynamics” (CFD) analysis of small-scale horizontal axis wind turbine blade
Horizontal axis wind turbine blade cross-sectionsare made by airfoils which are not uniform throughout the length
Summary
Strenuous exploration is continuously offered for the advancement of wind turbine technology. Keerthana et al have concentrated on the aerodynamic analysis of 3 kW small scale HAWT by CFD They first configured the turbine rotor by BEM. They concluded that flow separation occurred at wind speed 3 m/s and 4 m/s led the lower values of normal force and torque [4] Another investigation on BEM and CFD of HAWT was done by Dimitriadis et al.: Initially, they compared XFOIL values and CFD results for the coefficient of lift and drag. The air velocity streamlines at flow visualization were investigated in that study [6] This running work investigated the simulated performances of small scale wind turbine blade, which was made by mixed. The comparison between results which were gotten from BEM and CFD methods was made for the further analysis
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