The flow separation occurring in the S-shaped diffuser with boundary layer ingestion (BLI) has a significant effect on performance of embedded engine. Previous studies have found that area ratio (AR) as well length-to-offset (LOR) are key contributing factors affect features. Based phenomena observed previous an 100% BLI, hypothesis parameter height-to-radius (HRR) may also features is proposed...

Large area ratio nozzles that are employed for space propulsion applications not meant to be tested at the ground-level conditions because of flow occurs in their divergent section due low exhaust pressures. Therefore, it is desired perform experimental evaluation high-altitude evaluate performance said nozzles. Generally, a test facility, consisting supersonic diffuser, generally employed. In ...

A hybrid actuated silicon-based micropump with dynamic passive valves is described in this paper. The actuator is based on a combination of thick-film and silicon micromachining technology and relies on the flexure of a membrane structure of lead zirconate titanate on silicon. Inlet and outlet valves use the passive dynamic principle, where flow direction is realized with a diffuser and a nozzl...

Tidal energy is the most foreseeable form of renewable energy. Tidal energy can be harnessed by tidal barrage, tidal fence and tidal current technologies. Present efforts are focused on diffuser augmented tidal turbines that exploit the kinetic energy of the tidal currents. The power output by a tidal turbine is directly proportional to the cube of velocity of incoming fluid flow. Thus, even a ...

The axial flow screw-type oil-gas multiphase pump is mainly applied to oil and gas transport in the deep sea. In process of transporting medium, volume fraction (GVF) on phase changes from time-to-time, resulting performance being greatly influenced by phase. This paper presents a detailed analysis gas-phase distribution law vortex passages within means numerical calculations, supplemented expe...

A comprehensive numerical analysis was conducted to study the internal flow development in an integrated rocket-ramjet (IRR) propulsion system. The study consists of two parts: transition from the rocket booster to the ramjet sustainer and combustion dynamics during ramjet operation. The physical model of concern includes the entire IRR flow path, extending from the leading edge of the inlet ce...

It is quite well known that the diffusers are required for efficient conversion of the dynamic head generated by the impeller in a centrifugal fan. Hence the flow into the diffuser passage plays a crucial role in determining the efficiency of conversion. The flow in the region bounded by the impeller exit and the diffuser entry i.e. the radial clearance space is generally considered to be highl...

Dissolved Air (Pressure) Flotation-DAF, is a well-established separation process that employs micro-bubbles as a carrier phase. This work shows results concerning bubble generation at low working pressures in modified DAF-units to improve the collection of fragile coagula by bubbles. DAF of Fe (OH)3 (as model) was studied as a function of saturation pressure in the absence and presence of surfa...

In this paper, a self-adaptive flange is proposed for the wind turbine shrouded by a flanged diffuser to reduce the wind loads acting on the flanged diffuser at high wind velocities. The self-adaptive flange can maintain the advantages of the flanged diffuser at wind velocities lower than the rated velocity and reduce the wind loads acting on the diffuser and blades at higher wind velocities. N...

Apheresis is a procedure used to fractionate whole blood into its individual components. Following fractionation, the desired component is isolated and the remaining blood in many cases is returned to the donor. Leukapheresis is one type of apheresis where leukocytes (white blood cells) are selectively removed. This procedure is commonly used for blood transfusions to remove donor leukocytes fr...