국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Calibration for Thrust and Airflow Measurements in the CE-22 Advanced Nozzle Test Facility
저자	Werner, Roger A.;; Wolter, John D.
Keyword	CALIBRATING;; CHOKED FLOW;; DEFLECTION;; DISCHARGE COEFFICIENT;; INLET PRESSURE;; LOADS (FORCES); NOZZLE FLOW;; NOZZLE THRUST COEFFICIENTS;; PRESSURE RATIO;; REYNOLDS NUMBER;; TEST FACILITIES;; THRUST MEASUREMENT
URL	http://hdl.handle.net/2060/20100042397
보고서번호	NASA/TM-2010-216771
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	CE-22 facility procedures and measurements for thrust and airflow calibration obtained with choked-flow ASME nozzles are presented. Six calibration nozzles are used at an inlet total pressure from 20 to 48 psia. Throat areas are from 9.9986 to 39.986 sq. in.. Throat Reynolds number varies from 1.8 to 7.9 million. Nozzle gross thrust coefficient (CFG) uncertainty is 0.25 to 0.75 percent, with smaller uncertainly generally for larger nozzles and higher inlet total pressure. Nozzle discharge coefficient (CDN) uncertainty is 0.15 percent or less for all the data. ASME nozzle calibrations need to be done before and after research model testing to achieve these uncertainties. In addition, facility capability in terms of nozzle pressure ratio (NPR) and nozzle airflow are determined. Nozzle pressure ratio of 50 or more is obtainable at 40 psia for throat areas between 20 and 30 sq. in.. Also presented are results for two of the ASME nozzles vectored at 10deg, a dead-weight check of the vertical (perpendicular to the jet axis) force measurement, a calibration of load cell forces for the effects of facility tank deflection with tank pressure, and the calibration of the metric-break labyrinth seal.