Accession Number : AD0460563


Title :   AN ANALYSIS OF THE ACCURACY OF LIQUID-PROPELLANT ROCKET ENGINE PERFORMANCE MEASUREMENTS IN THE PROPULSION ENGINE TEST CELL (J-2A)


Descriptive Note : Technical rept., 28 May-4 Sep 1964


Corporate Author : ARO INC ARNOLD AFS TN


Personal Author(s) : Harper, C W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/460563.pdf


Report Date : Apr 1965


Pagination or Media Count : 48


Abstract : Measurements obtained during recent testing in the Propulsion Engine Test Cell (J-2A) are analyzed to determine the accuracy of measuring liquid- propellant rocket engine performance. The equipment and calibration techniques used to obtain the data and the statistical methods employed for error analysis are discussed. The results demonstrated that the one standard deviation errors in thrust, chamber pressure, cell pressure, oxidizer flow rate, and fuel flow rate measurements are less than =0.110, =0.198, =0.769, =0,181, and =0.150%, respectively. The accuracy of the primary calculated performance parameters, thrust coefficient, specific impulse, and characteristic velocity, are =0.226, =0.166, and =0.234% (one standard deviation), respectively.


Descriptors :   *LIQUID PROPELLANT ROCKET ENGINES , CALIBRATION , CAPTIVE TESTS , ERRORS , FLUID FLOW , INSTRUMENTATION , LUNAR PROBES , MEASUREMENT , PERFORMANCE(ENGINEERING) , PRESSURE , SPECIFIC IMPULSE , STATISTICAL ANALYSIS , THRUST , VELOCITY


Subject Categories : Liquid Propellant Rocket Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE