Two-phase flow-induced vibration of tilted curved bi-directional functionally graded nanopipe in supersonic airflow

Abstract

Flow-induced vibration is known as a prevalent phenomenon in various industries. As a result of the flow, dynamic fluid forces are generated, which lead to the excitation of the system. Multiphase flow, found commonly in both natural and industrial settings, including industrial plants, is a significant source of noise and vibration. In the two-phase flow, as a particular case of multiphase flow, flow configuration plays a major role in the system’s traits. Despite recent advancements in flow-induced vibration, it is still considered an unresolved topic. This research develops a new multi-physics simulation for the stability study of a two-directional functionally graded tilted curved cylindrical nanopipe conveying a liquid-gas two-phase flow. Nonlocal stress–strain gradient theory (NSGT) with two size-dependent parameters (nonlocal and length scale) is presented to simulate the current nanostructure. Newton’s second law has been employed to govern the resultant forces that act on a control volume at a differential fluid element of fluid. Hiring the finite element (FE) approach alongside the generalized differential quadrature role (GDQR), both the eigenvector and eigenvalue problems are presented for analyzing the characteristics of the nanosystem under various situations. An exhaustive parametric analysis is also provided to make clear the role of varied parameters such as velocity of fluid flow, aerodynamic pressure, air yaw angle, and gas volume fraction coefficient on the system’s fundamental frequency.

Keywords:

• Liquid-gas two-phase flow
• size-dependent factors
• aerodynamics
• multi-physics simulation
• cylindrical nanopipe

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was support by the Key Research and Development Program of Zhejiang Province (No. 2022C01074, 2022C01195) and Public Projects of Zhejiang Province (No. LGG21E060002), Key Science and Technology Project of Hangzhou (No. 2023SZD0041).