| タイトル | Estimating Engine Airflow in Gas-Turbine Powered Aircraft with Clean and Distorted Inlet Flows |
| 本文（外部サイト） | http://hdl.handle.net/2060/19970027377 |
| 著者（英） | Steenken, W. G.; Yuhas, A. J.; Williams, J. G. |
| 著者所属（英） | General Electric Co. |
| 発行日 | 1996-09-01 |
| 言語 | eng |
| 内容記述 | The P404-GF-400 Powered F/A-18A High Alpha Research Vehicle (HARV) was used to examine the impact of inlet-generated total-pressure distortion on estimating levels of engine airflow. Five airflow estimation methods were studied. The Reference Method was a fan corrected airflow to fan corrected speed calibration from an uninstalled engine test. In-flight airflow estimation methods utilized the average, or individual, inlet duct static- to total-pressure ratios, and the average fan-discharge static-pressure to average inlet total-pressure ratio. Correlations were established at low distortion conditions for each method relative to the Reference Method. A range of distorted inlet flow conditions were obtained from -10 deg. to +60 deg. angle of attack and -7 deg. to +11 deg. angle of sideslip. The individual inlet duct pressure ratio correlation resulted in a 2.3 percent airflow spread for all distorted flow levels with a bias error of -0.7 percent. The fan discharge pressure ratio correlation gave results with a 0.6 percent airflow spread with essentially no systematic error. Inlet-generated total-pressure distortion and turbulence had no significant impact on the P404-GE400 engine airflow pumping. Therefore, a speed-flow relationship may provide the best airflow estimate for a specific engine under all flight conditions. |
| NASA分類 | Aircraft Propulsion and Power |
| レポートNO | 97N26355
NASA-CR-198052
NAS 1.26:198052
H-2127 |
| 権利 | No Copyright |
