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Acta Aeronautica et Astronautica Sinica ›› 2026, Vol. 47 ›› Issue (7): 632973.doi: 10.7527/S1000-6893.2025.32973

• Special Topic: Aircraft-Engine Integration Technology • Previous Articles    

Research progress on aerodynamic design and flow control technologies for boundary layer ingestion inlets

Lei LIU1, Zhaorui ZHANG1, Kun WANG2, Zhihao WANG1, Chen ZHU1, Huijun TAN1(), Hexia HUANG1   

  1. 1. College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
    2. College of Urban Transportation and Logistics,Shenzhen Technology University,Shenzhen 518118,China
  • Received:2025-10-27 Revised:2025-11-24 Accepted:2025-12-16 Online:2026-01-22 Published:2026-01-09
  • Contact: Huijun TAN
  • Supported by:
    National Natural Science Foundation of China(12372294); Major Integration Project of the Special Scientific Research Program for Forward-Looking Layout of Nanjing University of Aeronautics and Astronautics(QZJC202401)

Abstract:

Boundary-Layer-Ingesting (BLI) propulsion technology uses a rear mounted engine to draw in the boundary layer on the fuselage, reducing the airflow velocity at the inlet of the intake duct and the outlet of the propulsion system, thereby achieving efficient flight of the aircraft. Compared to traditional propulsion systems, BLI propulsion systems have the potential to significantly reduce fuel consumption, flight resistance, and pollution emissions, and are a key development direction in the field of aircraft and engine integration in the future. As a specific practitioner of boundary layer ingesting, the performance of the BLI inlet directly affects the comprehensive benefits of the entire BLI propulsion system compared to traditional propulsion systems. Since its emergence, it has attracted widespread attention from scholars and research institutions at home and abroad. Based on this, this article provides an overview of the research background and progress of BLI intake duct technology, with a focus on discussing the aerodynamic design methods, research methods, internal flow mechanism, and internal flow control technology of BLI intake ducts. Finally, based on the analysis and summary of the current research status at home and abroad, the future development of BLI intake duct is discussed.

Key words: boundary-layer-ingesting propulsion technology, BLI inlet, aerodynamic design, internal flow mechanism, internal flow control technology

CLC Number: