نتایج جستجو برای: spiral groove
تعداد نتایج: 40910 فیلتر نتایج به سال:
In this paper, buckling of cylindrical grooved shells under axial load has been examined by theoretical and experimental methods. The shell is made of USA/API – X42 5L steel standards. This material is one of the most common materials used in gas, oil and petrochemical industries. The effect of spiral grooves on cylindrical shell was analyzed, and the results obtained from the Abaqus software w...
Clamp loaders load sliding clamps onto primer-template DNA. The structure of the E. coli clamp loader bound to DNA reveals the formation of an ATP-dependent spiral of ATPase domains that tracks only the template strand, allowing recognition of both RNA and DNA primers. Unlike hexameric helicases, in which DNA translocation requires distinct conformations of the ATPase domains, the clamp loader ...
Spiral grooves are used to enhance the generation of a fluid film between sliding surfaces mechanical face seal when fluids with poor lubrication properties be sealed. This technical solution allows reducing asperity contact, wear, and friction during operation, due full surfaces. However because thickness film, flow regime can turn from laminar turbulent. transition significantly affect perfor...
Abstract The water-lubricated bearings are usually the state of turbulent cavitating flow under high-speed conditions. And distribution cavitation bubbles and interface effect between two phases have not been included in previous studies on bearings. In order to study influence bubble dynamic characteristics spiral groove thrust (SGTB).A lubrication model based two-phase fluid population balanc...
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