What does this research mean for the field?

Boundary layer ingestion (BLI) fan performance penalties are driven not only by the magnitude of inlet swirl distortion but also by its axial reshaping, spanwise phase shift, and alignment with passage shock structures, which exacerbate shock-boundary-layer interactions and tip leakage. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Isolate and quantify swirl-driven compressible loss mechanisms and shock wave topology alterations in a transonic ducted fan operating under boundary layer ingestion across different rotational speeds.

August 28, 2026Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy

Impact of swirl-coupled BLI distortion on a transonic fan across varying rotational speeds

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Authors

KYKe Yao YXYifan Xue HDHefang Deng

Discussion

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Overview

Aerodynamic investigation reveals how swirl distortion reshapes shock topology and aerodynamic loss in transonic fan passages, highlighting the critical role of pre-passage flow reorganization.

Key Points

Isolate and quantify swirl-driven compressible loss mechanisms and shock wave topology alterations in a transonic ducted fan operating under boundary layer ingestion across different rotational speeds.
Evaluated coupled total-pressure and swirl inlet distortions across a transonic fan operating at design and reduced (80%) rotational speeds.
Performed thermodynamic entropy and dissipation breakdowns using the Boussinesq number combined with axial, radial, and circumferential incidence-angle analyses.
Entropy peaks localized at the blade tip and hub, where Mach number amplification reshaped shock wave topology and escalated shock-boundary-layer interactions along with tip leakage.
Viscous dissipation dominated losses in the core flow, whereas thermal dissipation contributed noticeably only in the tip region under minimal swirl.
Reducing rotational speed to 80% broadened the distortion-affected zones across the blade span while diminishing their localized intensity.

Cite This Study

Yao et al. (2026) studied this question.

synapsesocial.com/papers/6a914642d15324a1df3a9bc8 https://doi.org/10.1177/09576509261481374

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August 28, 2026Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy

Impact of swirl-coupled BLI distortion on a transonic fan across varying rotational speeds

View Full Paper

Ask AI

Bookmark

Authors

KYKe Yao YXYifan Xue HDHefang Deng

Discussion

Member takes

Overview

Aerodynamic investigation reveals how swirl distortion reshapes shock topology and aerodynamic loss in transonic fan passages, highlighting the critical role of pre-passage flow reorganization.

Key Points

Isolate and quantify swirl-driven compressible loss mechanisms and shock wave topology alterations in a transonic ducted fan operating under boundary layer ingestion across different rotational speeds.
Evaluated coupled total-pressure and swirl inlet distortions across a transonic fan operating at design and reduced (80%) rotational speeds.
Performed thermodynamic entropy and dissipation breakdowns using the Boussinesq number combined with axial, radial, and circumferential incidence-angle analyses.
Entropy peaks localized at the blade tip and hub, where Mach number amplification reshaped shock wave topology and escalated shock-boundary-layer interactions along with tip leakage.
Viscous dissipation dominated losses in the core flow, whereas thermal dissipation contributed noticeably only in the tip region under minimal swirl.
Reducing rotational speed to 80% broadened the distortion-affected zones across the blade span while diminishing their localized intensity.

Cite This Study

Yao et al. (2026) studied this question.

synapsesocial.com/papers/6a914642d15324a1df3a9bc8 https://doi.org/10.1177/09576509261481374

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