QJ 2655.3-1994 in English

1 Subject content and application scope

This standard specifies the technical requirements, calibration, test run procedures, data acquisition and processing methods of the steady-state thrust measuring system for missile used turbojet and turbofan engines during ground test.

This standard is applicable to the steady-state thrust measurement of missile used turbojet and turbofan engines (hereinafter referred to as engines). It may also be used as a reference for the thrust measurement of the pipe test bench after the measured thrust of the engine is corrected properly.

2 Normative references

QJ 28 Calculation method for static accuracy of pressure sensors
QJ 1023 Strain pressure sensor series

3 Terms

3.1
thrust loss coefficient
ratio of the difference between the standard force value applied by the calibration equipment and the output force value of the force sensor to the standard force value

4 Technical requirements

With comprehensive considerations of the mechanical part and electrical part, the thrust measuring system shall be designed to be convenient for use and reliable operation on the premise of ensuring that the system uncertainty meets the requirements of engine test outline.

4.1 Composition of thrust measuring system

The thrust measuring system consists of mechanical part and electrical part.

The block diagram for thrust measuring system is shown in Figure 1.

1 Subject content and application scope
2 Normative references
3 Terms
4 Technical requirements
5 Calibration and verification of thrust measuring system
6 Test run procedures
7 Test run data acquisition and processing
Additional explanation