For simulations in calm deep water with fixed sinkage and trim, the assessment metrics include drag and lift forces, pitch moment, drag-lift ratio, and center of pressure.
The Pareto front also displays a linear relation between sound reduction ratio and lift amplitude ratio, indicating a further substantial sound reduction of up to 30 [dB] for smaller lift ratio values.
The results show that the entrainment ratio, the pressure lift ratio and the overall ejector efficiency of the two-phase driven ejector are strongly affected by those parameters.
The results show that the designed feedback control system can reduce the drag to lift ratio considerably as compared to the unactuated case.
A cubic function for angular induction factor is found from the BEM analysis which is strongly dependant on the drag to lift ratio.
Greater gas cooler pressure, pressure lift ratio of ejector and cooling capacity of system could be obtained by increasing the volumetric flow rate Vte,wa, and compressor speed.
A version of k-ε RNG turbulence model and R600a working fluid was employed in this paper to investigate the effect of nozzle position on entrainment ratio, pressure lift ratio and the performance of the ejector.
First, a generalized quadratic equation on the angular induction factor is introduced which is related to local axial induction factor, blade local speed ratio, and drag to lift ratio.
Theoretical results described in this paper indicate a significant improvements in both entrainment ratio (Rm), and pressure lift ratio (PDE/Ps), above those achievable from jet-pumps designed using conventional methods.
A simulation based approach for nonlinear dynamical modelling and feedback control of the drag to lift ratio for aerofoils is investigated through case studies involving NACA 23012, ag13 and b737a aerofoils.
