330
Views
2
CrossRef citations to date
0
Altmetric
Research Article

Experimental Study on Combustion Efficiency and Gas Analysis of RDC with Different Blockage Ratio

, , , &
Pages 4166-4185 | Received 10 Jan 2022, Accepted 27 Mar 2022, Published online: 14 Apr 2022
 

ABSTRACT

Rotating detonation experiments with 220 mm outer diameter of combustor are carried out. The experiment used aviation kerosene (RP-3) as fuel and hot air as oxidant. Under the condition that the air flow at the inlet of the combustor is kept constant, when the blockage ratio is 50%, 65%, 75% and 90% respectively, the detonation is successfully initiated and works stably in the experiment. Temperature rise method was used to calculate the combustion efficiency of the rotating detonation combustor outlet. Through sampling, the gas at the rotating detonation combustor outlet was analyzed, and the complete combustion rate based on carbon atoms (CCR) was obtained. There is an optimal blockage ratio and equivalent ratio so that the combustion efficiency and CCR of the rotating detonation combustor reach the maximum value during the experiment. The mode of detonation wave is mainly double-wave collision mode. If the blockage ratio is too large, the propagation mode of detonation wave will change from two wave collision mode to axial pulse mode. At this time, the combustion efficiency and CCR will be greatly reduced. When the blockage ratio is constant, increasing the air flow rate is helpful to improve the combustion efficiency and CCR, and broad the working range of the rotating detonation combustor. The change of air flow rate at combustor inlet has little influence on the wave velocity of detonation wave, and the propagation mode of detonation wave is still two-wave collision mode.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (Grant Nos. 52106190,91941301, 91941105, 52025064,51790511).

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.