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Optimization sealing and cooling to control gas intrusion in a floating-wall combustion chamber

Shi Hong, Wang Rui, Chen Mingmin, Wang Jiao, Yuan Jie, Zhang Qianwei, Yang Kaijie

Bulletin of the Polish Academy of Sciences. Technical Sciences

2024

Vol. 72, nr 2

art. no. e148834

In response to the problems of high-temperature gas intrusion and ablation in the expansion slit between ceramic tiles under complex flow conditions in the floating-wall combustion chamber, as well as the issue of hooks exceeding their service temperature, numerical simulations and analysis were conducted for this paper. The study revealed the mechanisms of gas intrusion and sealing and proposed two evaluation metrics for evaluating the cooling effect: the maximum temperature of the hook and the proportion of high-temperature area on the sidewall of the tile. Furthermore, the CRITIC weighting method was used to analyze the weight of these metrics. Based on this, the spacing, radius, and length effects on sealing and cooling effectiveness were studied, and multi-parameter calculations and optimization were performed. The results showed that the degree of gas intrusion in the transverse slit was significantly higher than that in the longitudinal slit. In addition, the sealing method of the jet impingement could effectively cool the downstream of both the transverse and longitudinal slit. The spacing of the jet impingement holes had the greatest impact on the cooling effect, followed by the radius and length. Finally, when the spacing of the holes is 10 mm, the length is 18.125 mm, and the radius is 1.6 mm, the cooling effect is optimal, with the proportion of high-temperature area on the side wall of the tile being 20.86% and the highest temperature of the hook reaching 836.02 K.

Wpływ strumieni chłodzących na rozkład naprężeń i anizotropię w szkle hartowanym

Karvinen Reijo, Aronen Antti

Świat Szkła

2022

R. 27, nr 3

34--37

Słoneczne systemy chłodzenia absorpcyjnego i strumieniowego

Gil B., Nemś M.

Chłodnictwo : organ Naczelnej Organizacji Technicznej

2012

R. 47, nr 3

34-38

W artykule opisano urządzenia chłodnicze zasilane energią promieniowania słonecznego. Przegląd ograniczono do systemów absorpcyjnych i strumienicowych, którym, wg dostępnej literatury, poświęca się ostatnio najwięcej badań. Opisano możliwości zastosowania konkretnych rodzajów kolektorów w danym układzie chłodniczym, przytoczono ich charakterystyki. Dokonano teoretycznego opisu systemów absorpcyjnych jak i strumienicowych podając dodatkowo parametry pracy kilkunastu wybranych instalacji.

The article describes refrigeration systems powered by solar energy. Review was limited to absorption and ejector systems, which seems to have actually the greatest number of research devoted. The possibilities of application the various types of collectors in the cooling system were given. Their characteristics were also presented. Theoretical descriptions of the absorption and ejector systems, with additional parameters, of several selected installations were included.