Method of test data processing for missile used turbojet - Part 1: Stand bed test
1 Scope
This part specifies the method of processing the data measured in ground stand bed test of missile used turbojet.
This part is applicable to processing the data measured in ground stand bed test of missile used turbojet (hereinafter referred to as “turbojet”). It may also be referenced for processing the data measured in ground stand bed test of missile used turbofan engine.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply to this part.
GJB 241 General specification for aircraft turbojet and turbofan engines
GJB 359 Specification for humidity correction of performance of turbojet and turbofan engines
GJB 366.3 Atmospheric humidity (0 ~ 10 km)
GJB 378 Specification for temperature correction of performance of turbojet and turbofan engines
GJB 721 Specification for test cell correction of turbojet and turbofan engines
GJB 722 Specification for correction of test performance of turbojet and turbofan engines
3 Symbols
For the purpose of this part, the following symbols apply:
Am——the area of measured section of process intake, m2;
Am0——the area of measured section of process intake at 288.15K, m2;
A0——the sectional area of air inlet of stand bed, m2;
A3——the area of straight sections such as combustion chamber, m2;
A5——the effective sectional area of the nozzle exit, m2;
——the sectional area of the nozzle exit, m2;
A50——the sectional area of the nozzle exit at 288.15K, m2;
a0——the constant to be determined;
a1——the undetermined coefficient of the linear term of rotating speed, min/r;
a2——the undetermined coefficient of the quadratic term of rotating speed, min2/r2;
B——the comprehensive coefficient of combustion efficiency, (s·Pa1.8·m3)/kg;
b——the empirical index;
Foreword i
1 Scope
2 Normative references
3 Symbols
4 General requirements
5 Measurement parameters
6 Calculation parameters
7 Reduced parameters
8 Interpolation of reduced parameters
