ABSTRACT
In order to investigate the effect of the pipe length on the measurement, another two experiment are run with the use of the pipes of 2 m and 8 m in length respectively. The results for these two experiments are shown in Fig. 4 and Fig. 5. The experimental conditions for these two experiments are the same as those for the first. Just as shown in Fig. 3 , Fig. 4 and Fig. 5 , the pulsating frequencies of the pressure surges in the pipe increase and the magnitude damping becomes slow with the shortening of the pipe. Although the pressure surges vary with the pipe length, the calculated fuel injection rates show no difference. From the above results, it can be reached that the measuring result by this technique will be independent of the pipe length as well as the pipe diameter, if they are within proper ranges as stated before. This distinguishing feature makes the design of the test pipe very easy.
