USA As Represented by Secretary of the Navy

Other

John E Tucker

John F Reintjes

Paul L Howard

Lawrence L Tankersley

William P Heinrich

Sølve J Fjerdingstad

Thomas L McClelland

Bernard Slepak

A method and system for separating multicomponent fluids into components having different buoyancies. A flow shaping member has a helical channel that imparts a helical motion to the fluid, and a separation chamber for separating the moving fluid into a helically moving heavier flow portion and a more buoyant portion along the central axis. A flow receiving member has a first collection horn with a mouth arranged to collect the higher buoyancy fluid and direct the fluid to an outlet. At least one other fluid passageway for carrying lower buoyancy fluid has an inlet surrounding of the collection horn, and directs the fluid to a separate outlet at an end of the separator. Additional collection horns can be arranged concentrically around the first collection horn to collect intermediate buoyancy flows. Cascaded fluid separators can concentrate the higher buoyancy fluid or the denser fluid.

Cascaded axial fluid separator methods and systems

A system and method for maintaining the face of an optical window at a desired axial position with respect to the face of a high pressure housing, suitable for use in a high pressure optical flow cell for a real time optical particle monitoring system. The window fits within a mounting hole that extends through the pressure housing. The window has a smaller-diameter cylindrical end portion extending to the high pressure side and an opposite larger-diameter cylindrical end portion, with a shoulder between the cylindrical end portions. A threaded retaining member axially compresses a gasket, o-ring, or other compliant sealing member between the shoulder of the optical window and a corresponding shoulder in the mounting hole, creating a static seal and maintaining the high pressure face of the optical window at a desired position over a wide range of temperatures and pressures.

High pressure housing and optical viewing system

A high pressure optical flow cell system suitable for use in a real time optical particle monitoring system. The system is modular, with at least two housings joined together with removable mechanical attachment devices. Inlet and outlet passageways introduce and remove high pressure fluid into a flow cavity located between adjacent housing faces. An o-ring or other compliant member seal is provided between the faces to prevent leaks of the high pressure fluid. At least one optical window is provided with a substantially planar face flush with the flow cavity surface. An optical assembly maintains the face of the optical window flush with the flow cavity surface over a wide range of temperatures and pressures. A system and method for maintaining the face of the optical window flush with the flow cavity surface over a wide range of temperatures and pressures.

Method and apparatus for stabilizing the thickness of an optical channel for extended pressure environments

A flow separation system for separating multicomponent fluids into components having different buoyancies. The system can deaerate fluids, and segregate solid particles into a channel for removal or real time particle analysis. The system can have, positioned axially within a housing, a cup shaped first member having an axial passageway and a concave inner surface, a second member with a surface that forms a gap with the first member, the gap directing the flow into at least one helical channel. The flow exits the helical channel into a separation chamber positioned between the second member and a third member and separates into spinning heavier flow portion and a more buoyant portion that is driven toward the central axis. The third member has central fluid passageway that collects the higher buoyancy fluid and least one other fluid passageway for carrying lower buoyancy fluid, with an inlet positioned radially outward of the central fluid passageway.

Method and apparatus for separation of components of differing buoyancy mixed into a flowing fluid

An optical fluid monitoring system for imaging debris and other particles in a flowing fluid. The system can have multiple sensors (camera and viewing port) connected to a single, remotely located, laser and computer. The system can also include multiple lasers, viewing ports and cameras to be located at different locations in a flow, with each sensor being configured to image a different particle size range. The system can simultaneously image fluid flows on different pieces of equipment. Optical sensors can be arranged on parallel flow conduits, with each sensor configured to image a different particle size range.

Parallel multisensor optical particle sensors for flowing fluid systems

An optical fluid monitoring system for imaging debris and other particles in a flowing fluid. The system can have multiple sensors (camera and viewing port) connected to a single, remotely located, laser and computer. The system can also include multiple lasers, viewing ports and cameras to be located at different locations in a flow, with each sensor being configured to image a different particle size range. The system can simultaneously image fluid flows on different pieces of equipment.

Remote multisensor optical particle monitor for flowing fluid systems

A method and system for particle entrained fluid sampling, capable of sampling a high pressure and/or high flow rate fluid flow system using a pressure intensifier for applying pressure or suction to the fluid sample in the fluid sampling system operatively connected to a sample extractor and a sample analysis device. The pressure intensifier for applying pressure or suction is adjustable to provide control over the sample flow in the fluid sampling system. The fluid sampling system of the present invention may be particularly applicable to monitoring the condition of hydraulic and lubrication systems.

Method and apparatus for fluid sampling

A method for in situ sampling and monitoring of a fluid flowing in a flow path, whereby the fluid is to be directed to a chamber a first valve may provide a connection between an inlet to the chamber and the flow path and a second valve may provide a connection between an outlet from the chamber and the flow path, comprising the following steps: a) opening the first valve and the second valve to let the incoming fluid flow through the inlet to the chamber and from the chamber through the outlet into the continuation of the fluid path, thereby allowing fluid to circulate through the chamber for a certain time, b) trapping the fluid in the chamber by closing the second valve and thereafter closing the first valve, c) opening a valvefor reducing pressure, to obtain a pressure in the chamber suitable for monitoring the fluid, d) opening an access valveand leading the fluid trapped in the chamber into a monitor system wherein the fluid is analyzed, and thereby providing the data representing the fluid characteristics, e) providing exit for the fluid analyzed through a further fluid path possibly to a low pressure section of the system.

In situ sampling and monitoring a fluid

A moisture indicator is provided suitable for use in determining the wet-dry cycle of the soil surrounding cultivated plants. The soil moisture indicator comprises an upper and lower chamber with an interconnecting passageway across which is positioned an absorbent supporting material impregnated with a moisture sensitive indicator composition. The lower chamber has a bottom opening which upon insertion into the soil results in the relative humidity in the lower chamber being related to the wetness of the soil. The upper chamber is partially transparent and may optionally be vented to the outer atmosphere.

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Centreville, VA, United States of America

John E Tucker