Abstract

Supersonic and subsonic wind tunnel and laminate material properties useful for blades design using MATLAB codes are investigated. In present investigation parameters such as mass flow rate vs throat area, test duration vs mass flow rate, area Mach number relation and test duration vs throat height are considered for supersonic wind tunnel design. Similarly parameters such as pressure test section, pressure distribution, diffuser section head losses, and hydraulic diameter at test section are considered for subsonic wind tunnel design. The variations of ratio size of the open to test section, variable length of tunnel, variable nozzle length, and variable test section area for determining the variable critical dimensions (throat area and expansion ratio), estimating the attainable test duration, volumetric flow rate, mass flow rate, energy ratio for design of a supersonic nozzle and diffuser to minimize shocks in the test section. For the choice of blade material design; three different types of material properties are studied. The effects of ply angle on sensitivity of laminate material properties: cases of young modulus stiffness, Poisson ratio stiffness and shear modulus stiffness properties of a laminate for various orientations the ply angles between (00 and 900 ) in bending is considered. Comparing three types material properties, material Ref [33] found to have higher Young modulus stiffness in longitudinal direction, Shear modulus stiffness and Poisson ratio stiffness parameters for ply angles (150 ,300 ,450 ,600 ,750 and 900 ) except Young modulus stiffness in lateral direction considered for the choice of blade design material.

Keywords

airfoil, angle of attack, lift coefficient, drag coefficient, gliding ratio, lift force, young modulus, poisson ratio, micromechanical, stiffness properties, graphite epoxy, stochastic optimisation