摘要:
A combustor nozzle includes a downstream surface having an axial centerline. A plurality of passages through the downstream surface provide fluid communication through the downstream surface, and a downstream section of each passage has at least one of a frusto-conical or frusto-spherical shape. A method for modifying a combustor nozzle includes machining a downstream side of a body to remove a recast surface in a plurality of passages that provide fluid communication through the body. The method may further include machining a downstream section in each passage to form at least one of a frusto-conical or frusto-spherical surface in each passage proximate to the downstream side of the body.
摘要:
A method of assembling a fuel nozzle assembly for a gas turbine engine having a natural operating frequency includes providing a flange and providing a premix tube. The flange is fabricated from a first alloy such that the flange is configured to exhibit a first frequency that is different than the natural operating frequency of the gas turbine engine. The premix tube is fabricated from a second alloy such that the premix tube is configured to exhibit a second frequency that is different from the natural operating frequency of the gas turbine engine. The premix tube is coupled to the flange.
摘要:
A self-contained apparatus for aeroponically growing and developing plants that comprises a reservoir for containing a liquid nutrient solution, a conical tower, a power supply, and a pump to move the liquid nutrient solution through the apparatus. The apparatus utilizes a pump to move the liquid nutrient solution from the reservoir vertically to a distribution pipe. Gravity then pulls the liquid nutrient solution downward through the distribution pipe, which is sealed at the opposite end. The pressure created within the distribution pipe creates sufficient force to disperse the liquid nutrient solution through the opening(s) in the distribution pipe onto the exposed root mass. Once the nutrient solution has been dispersed into the conical tower it is absorbed by the exposed root mass. The un-absorbed liquid nutrient solution collects the in base of the conical tower and is returned to the reservoir to be reused.
摘要:
A column/beam, beam/beam interconnection in a building frame method. The interconnection of the method of the invention features (a) a pair of parallel-spaced, upright, planar plate components operatively associated with either a side of a column or a side of a beam, (b) an elongate, generally horizontal beam including a generally upright, planar central web with an end which, with respect to a pair of such plate components, extends into the space which exists between those components, and (c) a structural relationship in such a building frame associated with the plate components in a pair, which relationship accommodates (a) vertical-motion placement of a web end between components, with (b) the automatic establishment thereby of a correct relative, spatial, three-dimensional relationship and disposition of the plate components in the frame, and of the specific, associated column/beam and/or beam/beam elements so interconnected.
摘要:
Building frame shear-wall structure and associated methodology wherein the resulting structure includes (a) plural, elongate, spaced, interconnected columns and beams including elongate stretches which define and perimeter nominally open panes, and (b) within each defined and perimetered pane, an introduced, cured body of curable structural flow material spanning and effectively forming a column-and-beam-anchored rigidifying shear panel in the pane.
摘要:
Modular, selectively employable building parapet roof-rim structure including (a) gravity-docking reception structure deployed along and adjacent at least a portion of the perimeter of a building roof structure which is adjacent the top of a building frame, and (b) a dockable, modular parapet unit including gravity-docking structure removably and replaceably dockable, under the influence of gravity, with the reception structure to dispose the parapet unit as at least a part of an outwardly visible parapet roof-rim structure associated with the building roof structure. The parapet structure may be associated with moisture-barriering flashing structure which becomes locked into place along the rim of a building roof between inter-engaging components in the parapet structure.
摘要:
A method, and associated apparatus, for assembling a structural frame from elongate, tubular columns having plural sides, and a selected style of elongate beams, with respect to which, the method includes the steps of (a) pre-fitting the sides of such columns and the ends of such beams with attached, gravity-set, complementary interconnect structures (either collar-form or non-collar form in nature), including column-side-fitted interconnect structures and beam-end-fitted interconnect structures, (b) utilizing gravity, bringing interconnect-structure pre-fitted beams and columns into correct, predetermined, relative design dispositions relative to one another, and (c) through the performing of the bringing step alone, and on the resulting occurrence of the achievement of the mentioned correct, predetermined, relative design dispositions between a beam and a column, simultaneously and immediately thereby establishing (1) a full-moment load-bearing connection, and (2) a relatively positionally gravity-set-and-stabilized condition, between that beam and column.
摘要:
By providing a focal region of light onto a particle, a laser-based light source can provide enough radiation pressure to position the particle at any desired location in space. In one application, the particle can be a micrometer-sized bead, called a handle, attached to a sample. When the sample under examination, such as an actin filament, interacts with other molecules, such as myosin, the forces generated may displace the sample, and thus the handle, out of its original position. To correct for the off-target position (or in other words, to increase the stiffness of the handle), a feedback loop that utilizes a quadrant photodiode detector and a focal region location means such as an acousto-optic modulator or galvanometer mirror is incorporated in the optical trap system. Use of two other light sources for brightfield illumination and epifluorescence allows the simultaneous viewing of the sample in real time. In other embodiments, the optical trap system can trap and manipulate particles.
摘要:
An orthotic device is disclosed having a frame system, a first actuator, and a second actuator. The frame system may include a lightweight supportive material, and may be configured to receive a user's foot. The first actuator may be coupled to the frame system, and may be configured to activate and develop push of the forefoot of the user's foot during a walking step. The second actuator may be coupled to the frame system, and may be configured to activate and raise a user's toes.
摘要:
A combustor nozzle includes a downstream surface having an axial centerline. A plurality of passages extend through the downstream surface and provide fluid communication through the downstream surface. A plurality of slits are included in the downstream surface, and each slit connects to at least two passages. A method for modifying a combustor nozzle includes machining a plurality of slits in a downstream side of a body. The method further includes connecting each slit to at least two passages that pass through the body.