Through experiment and analysis of the combustion system for Rijke - ZT type pulsating boiler

the conclusions obtained are as follows: （1） adopting method of varying cross - sectional area for tubes can reduce the entry / exit loss of acoustic energy of the tubes

and the ratio of length to dwmcter cut be reduced; （2）after shrinking of both ends

the ratio of length to diameter for Rijke- ZT type burners has been significantly reduced

the working frequency doesn’t satisfy the requirement of 1/2 wavelength tube any more

the positions of burner heated surface are different from those of the straight

tube Rijke pulsating burners; （3） using the transfer matrix method of one - dimensional sound wave propagation

the pulsating frequency of Rijke -

ZT type burner can be estimated

and the error to be with in 10% ; （4） so long as the pulsating frequency of the said burner is lower than the cut -off frequency in the tail tube

the one- dimensional plane stationary wave can only be formed in the tail tube

thereby

at the same time of ensuring the entire Rijke - ZT type pulsating burner to be in normal operation

bend with arbitrary angle of the tail tube can be realised.