Wide-Range Fuel Flowmeter. Phase 2
Abstract
The Wide-Range Fuel Flowmeter (WRFF) development program proved the viability of the recirculation method of wide-range flow measurement over a 140 to 1 or greater range with a 1-percent or better measurement uncertainty. The objectives were to: (1) Reduce the size of the flowmeter and electronic conditioner and provide a more functional and economically producible system; (2) Replace the recirculating pump with a smaller, more reliable unit and assure that all components in contact with the fluid are compatible with jet fuels; (3) Provide means to disable recirculating flow when operating at high flow rates; and (4) Evaluate the performance of an air-driven pump for possible use in hazardous atmospheres. The meter was redesigned to greatly reduce its size and weight; large and expensive manifolds were eliminated, and wherever possible, commercially available fittings were used. Inwardly pointing tubes were incorporated to inject and retrieve the recirculating flow, reducing recirculation flow variation and related recirculation flow errors. The electronic conditioner was repackaged in a standard 3-1/2-by 19-in. rack mount. An auto-zero feature was created and incorporated in the electronic conditioner, greatly simplifying the accelerating the zeroing process. Testing was conducted to verify rangeability, transient response, long-term stability without re- zeroing, meter performance without recirculation, and performance using an air- driven pump.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1989
- Accession Number
- ADA210547
Entities
People
- William Seiler Jr.