Cryogenic hoses are an essential part of floating LNG transfer systems and play a crucial role during the side-byside offloading process between FLNG units and LNG carriers. With the ongoing development of offshore oil and gas fields moving into deeper waters, LNG cryogenic hoses have a significant and irreplaceable application prospect. This paper conducts a theoretical analysis and establishes a computational fluid dynamics (CFD) numerical model for the fluid flow characteristics inside the corrugated tubes of cryogenic hoses. Using FLUENT, simulations of internal flow characteristics under various operating conditions and structural parameters are performed for cryogenic hoses. The results provide a series of trends in terms of internal flow pressure drops and heat transfer coefficients, derivating a theoretical model for the flow and heat transfer in cryogenic hoses. This model provides a theoretical basis and correction factors for more accurate and efficient calculations. The findings of this work support the design of cryogenic hoses and lay a foundation for industrial production and domestic application of these hoses.

LNG cryogenic hose  /  structural features  /  flow characteristics  /  computational fluid dynamics