Fig. 1 JT9D Engine
Fig. 2 Rough JT9D Engine Schematic[5]
Fig. 3 Program Flow Chart
Fig. 4 Acceptance Flight Test Profile[8]
Fig. 6 Total pressure at each station for Cases 111 and 211
Fig. 7 Total temperature at each station for Cases 111 and 211
Fig. 8 Mass flow rate at each station for Cases 121 and 221
Fig. 9 Total pressure at each station for Cases 121 and 221
Fig. 10 Total temperature at each station for Cases 121 and 221
Fig. 11 Mass flow rate at each station for Cases 121 and 122
Fig. 12 Total pressure at each station for Cases 121 and 122
Fig. 13 Total temperature at each station for Cases 121 and 122
Fig. 14 Engine inlet air mass flow rate to time
Fig. 15 Bypass-Ratio to time
Fig. 16 High spool speed to time
Fig. 17 Thrust to time
Table 1 Estimation Variables for Off-design Calculation
Table 2 Flight Operating Condition Used in Calculation
Table 3 Nomenclature of the Flight Operating Conditions used in the Calculation
Fig. 5 Mass flow rate at each station for Cases 111 and 211
Table 4 Mass Flow Rate, Total Pressure, and Total Temperature using Ground Design Point
Table 5 Mass Flow Rate, Total Pressure, Total Temperature Error using Cruise Design Point
Table 6 Mass Flow Rate, Total Pressure, Total Tem-perature Error Using Reynold’s Correction
Table 7 Comparison of thrust calculated
References
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- Fafka, P. G., Skibo, M. A and White, J. L. "JT9D engine diagnostics. Task 2: Feasibility study of measuring in-service flight loads.[747 aircraft performance]," NASA-CR-135395, Oct 15, 1977.
- Jay, A. Todd, E. S. and Sallee, G. P. "JT9D jet engine performance deterioration," NASA. Langley Res. Center CTOL Transport Technol., pp. 45-58, 1978.