Supersonic combustion heat flux in a rotating detonation engine

Ladeinde, Foluso; Somnic, Jacobs

doi:10.1016/j.actaastro.2022.11.044

Cited by 7 publications

(1 citation statement)

References 31 publications

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“…Using a novel open-source conjugate heat transfer solver, Yelken et al [47] created a numerical model consisting of fluid domain and solid domain based on the OpenFOAM platform with a premixed H2-air mixture, and obtained the temperature variations of the inner and outer walls, as well as the fluid domain. Ladeinde et al [48] simulated the heat transfer of an RDC by means of an explicit large-eddy simulation (LES), which adopted a dynamic mechanism consisting of eight reaction steps and seven chemical substances. Hou et al [49] carried out a 3-D unsteady conjugate heat transfer simulation for premixed H2-air with heat conduction in both the inner and outer walls of an RDC.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Prediction and Heat Transfer Characteristics of Two-Phase RDE during Long-Duration Operation

Wang,

Song,

Chen

et al. 2024

Energies

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Accurately predicting the thermal characteristics and heat transfer distribution of the rotating detonation engine (RDE) and acquiring a clear understanding of the performance and mechanism of the rotating detonation are of great significance for achieving the safe and reliable long-duration operation of RDEs. Using RP-3 as fuel, a long-duration experimental study is performed on a 220 mm-diameter RDC to investigate the details with respect to the thermal environment. The heat flux at the typical location and the average heat flux of both the inner and outer cylinders are measured, respectively. Meanwhile, the peak pressure of the rotating detonation wave (RDW) and specific thrust are analyzed. When the ER is between 0.5 and 1 (oxidizer 2 kg/s), the stable rotating detonation mode is obtained, and the detonation duration is set as 40 s to accurately calculate the heat released by the detonation combustion. The heat flux in the upstream region of the RDW location ranges from 2.40 × 105 W/m2 to 3.17 × 105 W/m2, and the heat flux in the downstream area of the RDW location ranges from 1.05 × 106 W/m2 to 1.28 × 106 W/m2. The results demonstrate the important role of the detonation combustion zone, and the thrust performance of RDC can be improved by making the RDW move forward along the RDC axis, which is the optimal direction of detonation combustion. Through a comparison of average heat flux under different conditions, it is found that the heat released by the RDC is directly related to its thrust. In addition, the average heat flux of the inner cylinder is about three times that of the outer cylinder for the two-phase RDC with a Tesla valve intake structure, indicating that the high-temperature combustion product is closer to the inner wall. Therefore, more thermal protection should be allocated to the inner cylinder, and a more systematic analysis of the two-phase flow field distribution in the annular combustion chamber should be carried out to improve the thrust performance. In this paper, the average heat flux of the inner and outer cylinders of the RDC as well as the typical local heat flux of the outer cylinders is quantitatively measured by means of experiments, which not only deepens the understanding of RDC flow field distribution, but also provides quantitative boundary conditions for the thermal protection design of RDCs.

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Section: Introductionmentioning

confidence: 99%