70results about How to "Increase the wetted area" patented technology

An exhaust heat recovery apparatus includes an evaporation unit and a condensation unit communicated with the evaporation unit such that an operation fluid circulates therein. The evaporation unit is disposed in a first fluid passage through which a first fluid flows, and performs heat exchange between the first fluid and the operation fluid, thereby evaporating the operation fluid. The condensation unit is disposed in a second fluid passage through which a second fluid flows, and performs heat exchange between the second fluid and the operation fluid. The exhaust heat recovery apparatus further includes a wet area increasing member in a tube of the evaporation unit for increasing a wet area of the operation fluid due to surface tension of the operation fluid. The wet area increasing member is disposed adjacent to an inner surface of the tube and has extension surfaces extending in directions intersecting with the inner surface.

A blended wing body aircraft wherein at least each profile section corresponding to the normalized half-span values from 0 to 0.2 has a thickness ratio having a nominal value within the range set forth in Table 1. Also, a blended wing body aircraft wherein at least each profile section corresponding to the normalized half-span values from 0.15 to 0.3 has a normalized chord having a nominal value within the range set forth in Table 1, and wherein a ratio between a maximum thickness of the center body and the chord length along the centerline has a nominal value of at least 16%. Also, a blended wing body aircraft wherein a region of the aircraft defined by normalized half-span values from 0.1 to 0.2 has a normalized chord having a dimensionless rate of change from −3.5 to −5.1, and a thickness ratio having a rate of change from −0.27 to −0.72.

A sector-shaped liquid collection disc capable of containing multiple materials comprises a disc body, lug plates, a locating plate and a spacing plate. The disc body is in a conic ring shape and comprises an inner ring plate, an outer ring plate, two side plates and a bottom plate; the inner ring plate and the outer ring plate are obliquely arranged in the vertical direction, so that the cross sectional area of the upper portion of the disc body is larger than that of the lower portion of the disc body, and the size of the outer ring plate in the length direction and the size of the outer ring plate in the height direction are both larger than those of the inner ring plate; the two side plates are vertically arranged; and the lug plates are located on the upper edges of the side plates. The liquid collection area is increased due to the design manner that the upper portion of the disc body is wider than the lower portion; the spacing plate is arranged in the disc body to divide the disc body into regions, the liquid collection disc can collect the chemical materials of different types, and waste does not need to be poured frequently; and the locating plate and the lug plates are designed so that the liquid collection disc can be placed stably, and the situation that the materials are poured accidently is eradicated.

A Francis pump-turbine includes a runner provided with runner blades arranged around in a circumferential direction of a main shaft of the runner, each of the runner blades being supported by a band at a bottom side thereof in a blade height direction and supported by a crown at a head side in the blade height direction, in which the runner blade is formed, at a trailing edge thereof, with a curved portion expanding to the main shaft when the turbine is in operation, the curved portion has a maximum point with respect to a straight line connecting a crown-side trailing edge connecting end at which the trailing edge and the crown are connected and a band-side trailing edge connecting end at which the trailing edge and the band are connected, and an angle α formed by a straight line connecting the maximum point and the crown-side trailing edge connecting end and a straight line connecting the maximum point and the band-side trailing edge connecting end is set to be within a range of α≦150°.