3 results about "Dynamic equilibrium" patented technology

The invention discloses a reflooding cooling process analysis method and system. The method comprises the following steps: step 1, obtaining reflooding process data; 2, according to the re-submerging process data, obtaining a liquid core shear stress relation and a constitutive relation, and obtaining a disturbance wave height; 3, according to local shock cooling in the cooling process, a liquid film dynamic equilibrium relation is constructed, and the average vapor film thickness is obtained; 4, axial distribution of the minimum film state boiling temperature is obtained according to the disturbance wave height and the average steam film thickness; 5, shock cooling moments at different axial heights are obtained according to the axial distribution of the minimum film state boiling temperature, the relationship among the shock cooling speed, the shock cooling moments and the heights is obtained, the shock cooling speed of all the shock cooling moments is solved, and then analysis of the re-submerging cooling process is completed; according to the method, the problem of strong correlation of time-physical behaviors of two-phase evolution in the whole re-submerging process is solved, and accurate prediction of the whole strong transient re-submerging cooling process is realized.

This invention discloses a method and system for analyzing the steady-state of a laminar diffusion jet flame, relating to the field of gas turbine combustion technology. The method includes: obtaining the instantaneous propagation velocity of the laminar jet diffusion flame when the flame root reaches its final stable position during propagation towards the nozzle. S d and the local airflow velocity at that location U G ;according to S d and U G Determine the instantaneous combustion rate; compare the instantaneous combustion rate with... U G If the difference between the two is within a preset range, it indicates that the combustion rate and the local airflow velocity are in dynamic equilibrium, and it is determined to be a pusher flame; if the instantaneous combustion rate is greater than 1, it indicates that the combustion rate and the local airflow velocity are in dynamic equilibrium, and it is determined to be a pusher flame. U G If the difference exceeds a preset range, it indicates that the flame propagation and the extinction caused by heat loss are in equilibrium, and the flame is identified as an attached flame. This invention achieves precise identification of the flame's stable state by quantifying the comparison between combustion rate and airflow rate, providing a quantitative basis for combustion adjustment and significantly reducing operational blindness and time costs. A corresponding analysis system is also provided.

The present invention discloses a dynamic response analysis method for a piezoelectric hybrid functionally graded sandwich hyperbolic plate. Taking into account the deformation compensation control effect of the piezoelectric material in the FGM layer, the relevant dynamic equilibrium equations are established based on the constitutive equations of the piezoelectric material regarding the force, electricity, and thermal coupling of stress, strain, electric displacement, and electric field, as well as the relationship between the electric field and potential. The Galerkin method and Newmark-β method are then used to linearize and discretize the motion differential control equations of the piezoelectric hybrid FGM sandwich hyperbolic plate with a wrinkling effect under the action of a moving load. In the numerical results, the relationships between the temperature rise pattern and action range of the nonlinear temperature field, the action form and movement speed of the moving load, the wrinkle morphology and deformation range, the material performance parameters, the structural geometric parameters, the applied voltage, and the active control on the nonlinear dynamic response of the FGM sandwich hyperbolic plate are discussed.