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  • 1
    facet.materialart.
    Unknown
    Flight measured and calculated exhaust jet conditions for an F100 engine in an F-15 airplane (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The exhaust jet conditions, in terms of temperature and Mach number, were determined for a nozzle-aft end acoustic study flown on an F-15 aircraft. Jet properties for the F100 EMD engines were calculated using the engine manufacturer's specification deck. The effects of atmospheric temperature on jet Mach number, M10, were calculated. Values of turbine discharge pressure, PT6M, jet Mach number, and jet temperature were calculated as a function of aircraft Mach number, altitude, and power lever angle for the test day conditions. At a typical test point with a Mach number of 0.9, intermediate power setting, and an altitude of 20,000 ft, M10 was equal to 1.63. Flight measured and calculated values of PT6M were compared for intermediate power at altitudes of 15500, 20500, and 31000 ft. It was found that at 31000 ft, there was excellent agreement between both, but for lower altitudes the specification deck overpredicted the flight data. The calculated jet Mach numbers were believed to be accurate to within 2 percent.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-100419 , H-1449 , NAS 1.15:100419
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    On-Orbit Propulsion System Performance of ISS Visiting Vehicles (2013)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The International Space Station (ISS) represents the culmination of over two decades of unprecedented global human endeavors to conceive, design, build and operate a research laboratory in space. Uninterrupted human presence in space since the inception of the ISS has been made possible by an international fleet of space vehicles facilitating crew rotation, delivery of science experiments and replenishment of propellants and supplies. On-orbit propulsion systems on both ISS and Visiting Vehicles are essential to the continuous operation of the ISS. This paper compares the ISS visiting vehicle propulsion systems by providing an overview of key design drivers, operational considerations and performance characteristics. Despite their differences in design, functionality, and purpose, all visiting vehicles must adhere to a common set of interface requirements along with safety and operational requirements. This paper addresses a wide variety of methods for satisfying these requirements and mitigating credible hazards anticipated during the on-orbit life of propulsion systems, as well as the seamless integration necessary for the continued operation of the ISS.
    Keywords: Space Transportation and Safety
    Type: JSC-CN-28459 , 2013 AIAA Houston Annual Technical Symposium; May 17, 2013; Houston, TX; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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