Lirong Fu

A finite-volume method (FVM) is used to address combined heat transfer, natural convection, and volumetric radiation with an isotropic scattering medium, in a tilted shallow enclosure. Numerical simulations are performed in the in-house fluid flow software GTEA. All the results obtained by the present FVM agree very well with the numerical solution...

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 three-dimensional numerical simulation of the radiation heat transfer of the diesel engine in-cylinder was performed with the general fluid flow numerical simulation solver-GTEA, which was developed independently by us. The gas used in the diesel engine cylinder was assumed to be grey medium. In this study, a three-dimensional numerical method...

In this paper, a numerical method based on finite volume method for diesel engine is presented. The production of combustion is assumed to be a grey medium and the scatter of particle is neglected. In this paper the unstructured finite-volume method (UFVM) for radiation has been formulated and implemented in an in-house fluid flow solver GTEA. For...

This paper studies the problem of robustly stochastic stability of uncertain stochastic systems with time-varying delays, where the system is subjected to both Brownian motion and Markovian parameter jumping. By using some zero equations, neither model transformation nor bounding for cross terms is required to obtain the delay-dependent results. Th...

In paper of the second-order nonlinear heading control system of autonomous underwater vehicle, this paper has realized partial linearization of system using the method of input - output feedback linearization. In the zero dynamic stable situation, the performance controller guaranteed is made by linearized subsystem with using linear matrix inequa...

This paper is to concern the resilient guaranteed cost controller of autonomous underwater vehicles (AUVs) in vertical surface movement system. In this paper the system is a class of nonlinear singular time-delay systems with uncertainties. The uncertainties are not only in the systematic matrix but also in the controller gain. Based on linear matr...

In this paper, based on the dynamics model, taking into account the disturbance and control constraint, diving depth asymptotic stability controller of autonomous underwater vehicles is designed. Based on the establishment of the mathematic model of AUV and the linearization of processing , and assumed that the hydrodynamic parameters of the vehicl...

This paper studies a continuous linear control system with actuator and sensor faults for its guaranteed cost control and H∞ control. When the actuator and the sensor synchronize fault, in view of the actuator and the sensor performance's quality increase the quality of normal actuator and sensor under guarantee the system stabled, enables the syst...