Investigation into the Feasibility of Using Turbulators in Liquid Rocket Combustion Chamber Cooling Channels Using a Conjugate Heat Transfer Analysis

Bibliographic Review: The Influence of Obstacles Inside the Ducts on the Flow Proprieties

“…The feasibility of using obstacles in a cooling channel was investigated to reduce the maximum temperature of the hot gas wall. The addition of obstacles in the initial configuration showed that heat transfer could be increased with a subsequent pressure drop [20]. The study, with several configurations, showed the characteristics of thermal performance in the cooling channel (Figures 6 and 7).…”

“…Xiao and Oran [16] and Buchanan [20] show that the nozzle material is usually a metal or carbon compound capable of supporting high temperatures and the melting point of the most frequently used metals. When heated by the hot gas environment, the heat passes through the nozzle and radiates close to the outer surface, so only the nozzle or its extensions are made to be cooled by transferring heat by radiation into large liquid-propelled rockets since the material from which they are made is not tough enough to be used in the combustion chamber [21].…”

“…Figure 7. Viability front results with all labeled wedge cases, adopted from [20] In Figure 6, it is possible to observe the analysis of temperature and pressure on the hot gas walls and the analysis of the sidewalls compared to the baseline condition. It is verified that the maximum temperature of the hot gas wall of the initial wedge case is 661 K. This represents a reduction of 104 K compared to the baseline results.…”

“…Figure 9. Generated integral convolution line convolution, adopted from [20] Square geometry directs the flow laterally around it, but also directs the flow directly over it, which increases pressure losses, while triangular geometry facing backwards paralyses the flow laterally, while minimally force the fluid to abruptly change direction, moving completely over the obstacle. This lateral separation of the approaching flow turns into vortexes that rotate widely in the normal direction of the flow, increasing the mixing rate on the characterized surface and maintaining improvements at the time of flow.…”