In this study, an annular jet pump optimization method is proposed based on RBF (Radial Basis Function) neural network model and NSGA-II (Non-Dominated Sorting Genetic Algorithm) algorithm to improve the hydraulic performance of applied in submarine trenching dredging. Suction angle, diffusion area ratio flow were selected as design variables. The computational fluid dynamics (CFD) was used for...

Coal seam permeability is one of the key factors influencing gas extraction efficiency, which great significance to reduce coal and dynamic disasters in gassy mines. Hydraulic slotting technique an effective method stimulate reservoir, but selection parameters has impact on efficiency. For this reason, hydraulic model was established by using FLAC3D software analyze stress distribution before a...

During its near-ground hovering phase a Short Take-Off and Vertical Landing (STOVL) aircraft creates a complex three-dimensional flow field between jet streams, the airframe surface and the ground. A proper understanding and numerical prediction of this flow is important in the design of such aircraft. In this paper an experimental facility, used to gather validation data suitable for testing C...

The development of high-performance thermal systems has increased interest in heat transfer enhancement techniques. The application of additives to heat transfer liquids is one of the noticeable effort to enhance heat transfer. In this paper two-dimensional unsteady incompressible nanofluid flow in a confined jet at the laminar flow regime is numerically investigated. The Mixture model is consi...

Designing and manufacturing the multiple jets simulator and experimental investigation of the multiple jets in crossflow at low velocity ratios have been studied Together with design and build a low-speed wind tunnel. A specific rake is used to determine the flow field pressure and changes in static pressure measured by pressure taps in the near field of the jets. There are generally three regi...

Abstract: To study the influence of turning maneuvering navigation angle on inflow characteristics water jet propulsion pumps, numerical simulations were conducted mixed flow pumps under straight and left right 15 °/30 ° states. By comparing hydraulic performance differences five states, intrinsic relationship between pump morphology was elucidated, evolution mechanism conditions emphasized, co...

This study was conducted to determine the effects of different position angles in twin-jet spray applications on droplet penetration nozzle types. Seven types (standard flat fan, ST; narrow STN; multirange, LU; low-drift potential, AD; air-induction, IDK; IDKT) were used and nozzles positioned +15° along forward direction, perpendicular ground surface 0? reverse direction -15°. Spray experiment...