Lilong Jing

• PhD
• Harbin Engineering University

Deep transfer learning methods have achieved promising progress in the fault diagnosis field with insufficient data. However, these methods still face some challenges in industrial scenarios: First, the fault characteristics are extremely weak in the early fault stage. Second, a significant distribution discrepancy exists between laboratory conditi...

Rotary compressors are designed more and more compact and the compressor cylinder's ambient pressure is designed very high to facilitate oil separation and improve efficiency. However, these designs cause the working condition of the thrust bearing becoming harsher, and severe wear may occur. The present study is aimed at mitigating its wear condit...

Rolling piston compressors, which are widely used in refrigeration systems, contain a vane-vane slot friction pair that significantly affects its mechanical efficiency and reliability. In this study, a new simulation model considering the deformation and detailed groove design of the vane-vane slot system is presented. The simulation results show t...

The hermetic rotary compressor’s bearings, including the thrust bearing, the main and sub bearings, work together under high ambient pressure. The thrust bearing works under light axial loads, but sever wear is found, which may be related to the crankshaft’s misalignment and deformation and the high ambient pressure. To investigate this phenomenon,...

Based on a general IC engine working process simulation model, a program for solving three dimensional unstructured radiative heat transfer in internal combustion engines was developed by using a scattering medium radiative heat transfer model. Under the assumption that the combustion products were made up of isotropic scattering media, a numerical...

To advance the study of the flow-induced noise generated by low-speed flow passing multiple bodies, in this paper, we propose a Viscous/Acoustic splitting method for forecasting the noise induced by flow passing two cylinders. We use the general hydromechanics numerical simulation software GTEA, which is developed by the authors, to compile the cal...

A new approach based on combination of cell-center finite volume method (C-C FVM) and Timoshenko beam theory has been developed to analyze static and free vibration of functionally graded beams in this paper. The general dynamic equations for under uniformly load functionally graded beam (FGB) are derived using Hamilton’s principle, and the equatio...

The finite-volume method (FVM) for radiation heat transfer with a nonscattering medium is extended to an isotropic scattering medium, and this method is implemented in the fluid flow solver GTEA on hybrid grids. For comparison and validation, three test cases, a semicircle enclosure with a hole, a rhombic enclosure, and a square cavity, are chosen....

In order to explore a numerical simulation method based on the Timoshenko beam model, a study was done on beam numerical simulation using the Timoshenko beam model, based on the finite volume method (FVM). In order to examine the beam's shear deformation, the beam model was discretized by FVM, and static and dynamic analyses were conducted. After f...

A direct numerical method for the anisotropic diffusion equation is presented and the balance-point method and adaptive method are also derived. All these methods are formulated and implemented in the in-house fluid flow solver GTEA. Two test cases, an isotropic problem and an anisotropic problem with exact solution on a skewed mesh, are chosen for...

The numerical simulation of combined natural convection and radiation heat transfer with a participating medium in a square cavity was performed with the in-house software GTEA (General Transport Equation Analysis). The results obtained by the present method are good consistent with the solutions of the literature. Further, the Effects of Planck nu...