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Experimental waterflow determination of the dynamic hydraulic transfer function for the j-2x oxidizer turbopump. part two; results and interpretation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Patel, Sandeep Zoladz, Tom Lee, Erik Karon, Dave |
| Copyright Year | 2011 |
| Description | Experimental results describing the hydraulic dynamic pump transfer matrix (Yp) for a cavitating J-2X oxidizer turbopump inducer+impeller tested in subscale waterflow are presented. The transfer function is required for integrated vehicle pogo stability analysis as well as optimization of local inducer pumping stability. Dynamic transfer functions across widely varying pump hydrodynamic inlet conditions are extracted from measured data in conjunction with 1D-model based corrections. Derived Dynamic transfer functions are initially interpreted relative to traditional Pogo pump equations. Water-to-liquid oxygen scaling of measured cavitation characteristics are discussed. Comparison of key dynamic transfer matrix terms derived from waterflow testing are made with those implemented in preliminary Ares Upper Stage Pogo stability modeling. Alternate cavitating pump hydraulic dynamic equations are suggested which better reflect frequency dependencies of measured transfer matrices. |
| File Size | 27529 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120002802 |
| Archival Resource Key | ark:/13960/t5x68gr09 |
| Language | English |
| Publisher Date | 2011-12-05 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Propulsion And Power Stability Tests Turbine Pumps Transfer Functions Liquid Oxygen Ares 1 Upper Stage Cavitation Flow Frequencies Correction Oxidizers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
