OPR

(redirected from Operating Pressure Ratio)
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AcronymDefinition
OPROperator
OPROffice of Primary Responsibility
OPROpen Peer Review
OPROperations
OPROffice of Professional Responsibility
OPROperate
OPROverall Pressure Ratio
OPROffice of Professional Regulation (various locations)
OPROffice of Planning and Research
OPROut Pulse Rule
OPROfficial Pattern Release
OPROffice Password Recovery
OPROperation
OPROnshore Pipeline Regulations (Canada)
OPROffice of Population Research (Princeton University)
OPROld Port Rum
OPROffre Publique de Retrait
OPROffice of Parental Representation (various locations)
OPROfficer Performance Report
OPROwner's Project Requirements (building design)
OPROffice of Parks and Recreation (Oakland, CA)
OPROpen Pattern Repository (software pattern project)
OPROutside Pack Referee (Women's Flat Track Roller Derby)
OPROffice of Public Relations (Centers for Medicare & Medicaid Services)
OPROn Premise Reserve (aviation)
OPROther People's Resources
OPROffice of Principal Responsibility
OPROwner Program Requirements
OPROnline Public Relations
OPROperation Patriot Readiness
OPROperator Performance Rate
OPROld Parochial Register (genealogy; UK)
OPROfficial Poker Rankings (website)
OPROld Prussian (linguistics)
OPROptical Pattern Recognition
OPROrganización de Protección Reconocida
OPROrganization of the People of Rodrigues (Mauritius)
OPROptical Power Received
OPROld Plank Road (Irish acoustic band)
OPROracle Parallel Server (HP)
OPROffice of Prime Responsibility
OPROverseas Publishers Representatives (New York, NY)
OPROperating Pressure Ratio (jet engine compression ratio)
OPROrganization of Primary Responsibility
OPROngoing Precision Recovery
OPROperational Project Requirements
OPROffice of Public Record
OPROffsite Procurement Request
OPROptimal Page Replacement
OPROrganizational Process Record
OPROutside Plant Repeater (Hekimian)
OPROne Price Repair (various companies)
OPROrganizational Profitability Reporting
OPROrthogonal Projection Routine
OPROhio Pig Roast (catering; Columbus, OH)
OPROriginal Purchase Receipt
OPROfficer with Primary Responsibility
OPROutage Probability Region
OPROld People Rock
OPROverall Project Review
OPROperability Recommendation (various organizations)
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References in periodicals archive ?
A series of normalized crack defect depth and length curves were produced, representing failures at the hoop stress for the specific class hydrostatic test pressure to operating pressure ratio in accordance with 49 CFR Part 192, Subpart J and ASME B31.8.
"By merging innovative adaptive engine and next generation technologies with the best features of our proven F119 and F135 engines, we aim to reduce fuel burn up to 25 percent more than the current generation of fighter engines." The AETD program will lead to demonstration testing of an advanced high operating pressure ratio (OPR) core in late 2015, to be followed in 2016 by full engine testing of a three-stream adaptive fan and three-stream compatible augmentor and exhaust system.
The AETD programme will lead to demonstration testing of an advanced high operating pressure ratio (OPR) core in late 2015, to be followed in 2016 by full engine testing of a three-stream adaptive fan and three-stream compatible augmentor and exhaust system.
If the mechanical compression ratio requirement could be kept at a moderate level, the constant volume or detonative combustion process would be able to inherently deliver an additional pressure gain and increase the final overall operating pressure ratio of the device at a potentially lower system cost.