A modified streamwise body force model of fan with distorted inflow for rapid propulsion-airframe integrated simulation

Li, Zhiping; Zhang, Yafei; Pan, Tianyu; Zhang, Jian

doi:10.1016/j.cja.2023.08.007

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…During the simulation procedure, different force and energy source terms are then added to the momentum and energy equations by searching the fan performance map, which ultimately ensures that the net streamwise force is zero. The details of the streamwise body-force model can be found in references [31,32]. Figure 6 shows the Ma contour on the symmetry plane of BWB-350 with DPS at cruise.…”

Section: Modeling Methodsmentioning

confidence: 99%

“…space 2024, 11, x FOR PEER REVIEW where the fan was modeled using the streamwise body-force mode body-force model is a fan performance map at different rotating spee ulation procedure, different force and energy source terms are then ad tum and energy equations by searching the fan performance map, w sures that the net streamwise force is zero. The details of the streamwis can be found in references [31,32]. Figure 6 shows the Ma contour on t of BWB-350 with DPS at cruise.…”

Section: Modeling Methodsmentioning

confidence: 99%

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Conceptual Design of Layered Distributed Propulsion System to Improve Power-Saving Benefit of Boundary-Layer Ingestion

Li,

Lu,

Pan

2024

Aerospace

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DPS (distributed propulsion system) utilizing BLI (boundary-layer ingestion) has shown great potential for reducing the power consumption of sustainable AAM (advanced air mobility), such as BWB (blended-wing body) aircraft. However, the ingesting boundary layer makes it easier for flow separation to occur within the S-shaped duct, and the consequent distortion due to flow separation can dramatically reduce the aerodynamic performance of the fan, which offsets the power-saving benefit of BLI. By analyzing the source of power saving and power loss of BLI, this paper presents the LDPS (layered distributed propulsion system) concept, in which the freestream flow and boundary-layer flow are ingested separately to improve the power-saving benefit of BLI. In order to preliminarily verify the feasibility of LDPS, an existing DPS is modified. The design parameters and the system performances of LDPS are studied using a 1D engine model. The results show that there is an optimal ratio of the FPR (fan pressure ratio) for the FSE (freestream engine) to the BLE (boundary-layer engine) that maximizes the PSC (power-saving coefficient) of LDPS. This optimal ratio of FPR for the two fans can be obtained when the exit velocities of FSE and BLE are the same. Under the optimal ratio of FPR for the two fans, the PSC of LDPS is improved by 5.83% compared to conventional DPS.

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Section: Modeling Methodsmentioning

confidence: 99%

Section: Modeling Methodsmentioning

confidence: 99%