By R. Varatharajoo, E. J. Abdullah, D. L. Majid, F. I. Romli, A. S. Mohd Rafie
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Extra resources for Aerotech IV: Recent Advances in Aerospace Technologies: Selected, Peer Reviewed Papers from the AEROTECH IV, November 21-22, 2012, Kuala Lumpur, Malaysia
2 and the drag coefficients Cdp , Cf , Cdi are given could be found from , where Cf is the skin friction coefficient for flat plate and K is the factor to account for unsteady flight. 4 as given by Scherer  will be used. 8 for elliptical wing. Total section drag is thus given by dDi = dD d = dD p + dD i . (10) The circulatory lift dLc, non-circulatory force dNnc and drag dDd for each section of the wing changes its direction at every instant during flapping. These forces in the vertical and horizontal directions will be resolved into those perpendicular and parallel to the forward velocity, respectively.
27. The objective of this research is to investigate the performance of meso-scale rocket injectors with various orifice geometries. The performance is defined by the air core diameter as a function of injection pressure. Experimental Cold Flow Test. An experimental test rig was constructed to measure the air core diameter as shown in Fig. 1. All atomizers were tested using water at room temperature as working fluid to investigate the air core diameter at different injection pressure. First, water tank is fully filled with water.
Romli, A. S. Mohd Rafie and K. A. R Halder et al. . In their work, they had measured the value of air core diameter in the swirl chamber and in the orifice with various geometrical parameter of atomizer. They found that both air core in swirl chamber and orifice increase with an increasing Do/Ds. A. Hamid et al. . They found that the smallest numbers of tangential port and higher injection pressure leads to larger air core diameter. The research on air core inside the atomizer had also been made by Sunghyuk Kim et al.
Aerotech IV: Recent Advances in Aerospace Technologies: Selected, Peer Reviewed Papers from the AEROTECH IV, November 21-22, 2012, Kuala Lumpur, Malaysia by R. Varatharajoo, E. J. Abdullah, D. L. Majid, F. I. Romli, A. S. Mohd Rafie