摘要:
A counter-current apparatus uses solid blocks to carry mass or heat storage medium to opposite sides of mass and heat transfer operations. The blocks are pushed incrementally through two channels. The energy of sensible heat or mass of selected species from a first fluid stream transfers into the solid blocks in a first channel and is stored in the solid storage medium within. Those solid blocks loaded with energy or specific mass from the first channel are pushed to a second channel in which the energy or specific mass stored within is released to a second fluid stream. The solid blocks in the second channel are pushed back into the first channel, continuing the heat transfer or mass transfer cycle. Counter-current flows of the fluid phase and the solid phase are achieved in both channels, for a combined adsorption and desorption cycle, or a combined heating and cooling cycle.
摘要:
An aerodynamic golf club head producing reduced aerodynamic drag forces. The club head has crown section attributes and material attributes that impart beneficial aerodynamic properties and performance.
摘要:
In one example, an antenna radome may have at least a first face that includes a plurality of surface features, where the plurality of surface features may include at least a first ridge and at least a first depression, and where the plurality of surface features may be oriented longitudinal along the antenna radome. In another example, an antenna radome may have at least a first face that includes a plurality of surface features, where the plurality of surface features may include at least a first ridge and at least a first depression, and where the plurality of surface features may be oriented transverse along the antenna radome.
摘要:
A fairing (1) for improving fluid flow around a circular-cylindrical object comprises a first fairing-element (11) and a second fairing-element (12), which are releasable relative to one another. The fairing-elements are easy to manufacture, compactly stackable, and easy to install around the object. In installed condition, the first fairing-element and the second fairing-element are mutually connected in circumferential direction of the fairing, while forming a twin-fin fairing, which reduces vortex-induced vibrations around the object, while providing favourable flow resistance, and without performing galloping motions.
摘要:
The invention relates to a wind turbine blade oscillation preventer comprising an aperture and a sleeve and having a peripheral extent and a longitudinal extent, the preventer being configured for removable application over a wind turbine blade and configured to extend longitudinally thereover and peripherally thereabout; the preventer having a non-aerodynamic exterior surface which exhibits a rough surface capable of disrupting smooth or laminar airflow over a substantial portion of the longitudinal and peripheral extent of the sleeve when the preventer is in place on a wind turbine blade. The preventer further comprises a smooth interior surface extending along a substantial portion of the longitudinal extent of the sleeve. The invention also relates to a method of application of a blade oscillation preventer over wind turbine blades which comprise serrations at a trailing edge thereof.
摘要:
The present invention is a system and method for reducing the amount of drag experiences by a moving vehicle as the result of primary airflow across vehicle body edges by introducing a secondary airflow at said edge to reduce the negative pressure created by such an edge such that the turbulence caused by the primary airflow is prevented or reduced.
摘要:
The present disclosure describes a strategy to create self-healing, slippery liquid-infused porous surfaces (SLIPS). Roughened (e.g., porous) surfaces can be utilized to lock in place a lubricating fluid, referred to herein as Liquid B to repel a wide range of materials, referred to herein as Object A (Solid A or Liquid A). SLIPS outperforms other conventional surfaces in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low-contact-angle hysteresis (
摘要:
A fairing for suppressing a vortex induced vibration (VIV) of a tubular. The fairing including a tail member dimensioned to suppress a vortex induced vibration of a tubular. The fairing further including an encircling member dimensioned to encircle less than an entire circumference of a tubular, the encircling member being separable from the tail member. The fairing further including a connecting assembly dimensioned to attach the tail member to the encircling member.
摘要:
The invention provides a construction comprising a structural element and at least one cable (101) arranged in tension to carry at least a part of the weight of the structural element. The cable defines an outer surface (102) onto which at least one strake (104) forms a protrusion for reducing rain and wind induced vibrations. The strake has a height being a distance from a strake root part connected to the outer surface of the cable and a strake end part terminating the strake outwards away from the cable, and the strake has a width being transverse to the height, the width decreasing in the direction from the strake root part towards the strake end part. The height is less than 5 percent of the diameter of the cable. Furthermore, the strake comprises a first strake surface portion facing away from the cable, which first strake surface portion is concave or straight.
摘要:
A fairing device for the reduction of vortex-induced vibrations or motions and the minimization of drag about a substantially cylindrical element immersed in a fluid medium, comprising; a cylindrical element, a fairing rotatably mounted about the cylindrical element, the fairing comprising a shell with a cylindrical cross-sectional shape with an outer diameter (D) following the outer diameter of the cylindrical element from an upward stagnation point of 0 degrees to at least +/−90 degrees, and which at +/−90 degrees continues as two fin-like portions in an aft direction and defining a chord length (C), further comprising that the fin-like portions are convexly curved aft of +/−90 degrees thus tapering towards each other and defining a tail end opening or gap less than the fairing standoff height.