In this portable blower, which has a fan guard (40) attached to the outside of a suction opening (30) formed in a side surface of a volute chamber (24) accommodating a blower fan (20), a concave portion that is recessed from the outside toward the suction opening (30) and is arranged substantially concentrically with the blower fan (20) in the axial direction is formed in the fan guard (40), multiple first air holes (45-48) are formed on the inside of the concave portion, and multiple second air holes (42) are formed on the outside of the concave portion. Even if an obstructing object (X) adheres to the fan guard (40) air flows as in (BA3) and (BA4), and negative pressure in the indented area is dispersed, so the state of clinging can easily be eliminated.

An improved guard for a pump propeller is described herein. The guard includes a hub that in use surrounds a drive shaft of a drive motor unit that drives the propeller. The vanes define a propeller receiving area in which the propeller is received allowing the propeller to rotate relative to the vanes, while portions of the vanes radially surround the propeller. The guard is fixed in position about the propeller to protect the propeller from debris and to prevent human contact with the rotating propeller. The guard is designed to shed weeds and other debris, and prevent weeds and other debris from becoming entangled on the guard and with the propeller.

Wind funnel and gas combustion turbine systems are disclosed. Air travels through a wind funnel where it is compressed, and then flows into a compression section of a gas turbine that is fueled by a hydrocarbon fuel source such as natural gas. Compressed air from the wind funnel enters the compression section of the gas turbine through one or more air inlets toward multiple rotating turbine blades in an air feed direction having a component normal to air impact surfaces of the turbine blades. In addition to the compressed air from the wind funnel, ambient air may be introduced into the compression section of the gas combustion turbine.

Wind funnel and gas combustion turbine systems are disclosed. Air travels through a wind funnel where it is compressed, and then flows into a compression section of a gas combustion turbine that is fueled by a hydrocarbon fuel source such as natural gas. Compressed air from the wind funnel may enter the compression section at selected locations. The compression section may have a front relatively low compression section and a downstream relatively higher compression section, and the compressed air from the wind funnel may be selectively delivered to one or both of the lower and higher compression sections. In addition, ambient air may be introduced into the lower compression section. During periods when compressed air from the wind funnel is delivered to the downstream higher compression section, the front lower compression section may be decoupled from the downstream section.

A modular fan housing configured to hold an array of motors and fans is provided. The modular fan housing is configured for use in an air-handling system that delivers air to a ventilation system for at least a portion of a building. The fan housing comprises a plurality of modular units configured to be stacked adjacent to one another in at least one row or column to form an array. The modular units each include an interior surface and have a front end and a back end that define a chamber. The chambers are configured to receive the motors and fans. Sound attenuation layers extend along at least a portion of the interior surface of the corresponding chambers. The sound attenuation layers are positioned between at least some of the adjacent chambers.

A method of manufacturing a cooled gas turbine component includes forming a core with an outer surface. The outer surface includes a core feature. The method also includes casting an outer wall of an airfoil about the core. The outer wall has an exterior surface and an interior surface. The interior surface includes a shaped inlet portion that corresponds to the core feature. Moreover, the method includes forming an outlet portion through the outer wall to fluidly connect the outlet portion to the shaped inlet portion. The shaped inlet portion and the outlet portion cooperatively define a cooling aperture through the outer wall.

Wind funnel and gas combustion turbine systems are disclosed. Air travels through a wind funnel where it is compressed, and then flows into a compression section of a gas turbine that is fueled by a hydrocarbon fuel source such as natural gas. Compressed air from the wind funnel enters the compressor section of the gas turbine at relatively high density and force, and then flows to the combustion section of the gas turbine where oxygen from the wind-compressed air is used to combust the hydrocarbon fuel supplied to the gas turbine. The combustion section drives a power output generator having first and second generators that are selectively engageable and disengageable from each other. During periods when compressed air from the wind funnel is delivered to the compression section of the gas combustion turbine, the first and second generators may be drivingly engaged with each other by a generator coupling mechanism.

An intake device for a pump includes an inlet section extending in a first direction for guiding a fluid, an outlet section for delivering the fluid to an inlet of the pump, the outlet section extending in a second direction perpendicular to the first direction, and a diverting section for diverting the fluid from the first to the second direction, the diverting section connecting the inlet and outlet sections, and having a bottom wall opposing the an outlet opening and a back wall opposing an inlet opening, the inlet section tapering towards the diverting section to decrease a cross sectional area of the inlet section, the diverting section includes a splitter member arranged on the bottom wall that tapers in the second direction towards the outlet opening, and the outlet section includes an essentially bell shaped reducing part for decreasing a cross sectional area of the outlet section.

A method of manufacturing a cooled gas turbine component includes forming a core with an outer surface. The outer surface includes a core feature. The method also includes casting an outer wall of an airfoil about the core. The outer wall has an exterior surface and an interior surface. The interior surface includes a shaped inlet portion that corresponds to the core feature. Moreover, the method includes forming an outlet portion through the outer wall to fluidly connect the outlet portion to the shaped inlet portion. The shaped inlet portion and the outlet portion cooperatively define a cooling aperture through the outer wall.

A system and method for ram air intake for pulse combustion systems is disclosed that improves the ability of pulse combustions to ingest air into the inlet pipe when the pulse combustion system is moving in a direction opposite the direction the open end of the inlet pipe is facing and the system and method includes the ability to increase the thrust output from the pulse combustion system.