4 results about "Thermodynamic process" patented technology

The application relates to the technical field of aircrafts, and discloses a calculation method, equipment and medium for the multi-physical effect of ablation particles, the method comprising the following steps: acquiring equivalent inertia items induced by respective multi-physical effects; calculating a multi-physical particle dynamics process according to a particle sliding resistance item and the equivalent inertia items induced by the respective multi-physical effects; performing dimensionless processing on a radiation heat transfer equation of spherical particles in the volume of an arbitrary sampling unit to obtain a dimensionless radiation heat transfer equation; and calculating a thermal radiation particle thermodynamic process by using the dimensionless radiation heat transfer equation. The method can reflect complex physical processes under extreme mechanical environments, ensure that numerical simulation can reproduce the original appearance of ablation physics, has engineering interaction of ablation problems, automatically performs dimensionless processing, avoids numerical rigidity caused by dimensional differences of different physical problems, and fills the gap that the prior art cannot calculate complex processes of multi-physical effects of ablation particles under extreme mechanical conditions.

The invention relates to a method for calculating independent entropy in a thermodynamic process, which specifically comprises the following steps of: describing a thermodynamic process, and dividing the thermodynamic process into independent reversible processes; establishing an independent entropy of an independent reversible process: obtaining a heat capacity value, a reversible point and a phase change in the reversible process according to thermodynamic data; substituting into an independent heat capacity entropy formula, and solving the independent heat capacity entropy; all the reversible processes form a unit entropy, and the thermodynamic value is substituted into a formula of the independent phase change entropy to obtain the independent phase change entropy; according to an independent heat capacity entropy and phase change entropy method, an independent standard entropy is determined. Substituting each independent reversible process median into an independent standard entropy formula to obtain an independent standard entropy; and finally, drawing a geometric diagram of the independent standard entropy according to an independent standard entropy formula by using the heat capacity value, the reversible point and the phase change enthalpy value in each reversible process. The heat effect of the heat capacity process in the calculated independent heat capacity entropy is in one-to-one correspondence with the temperature interval of the heat capacity process, and a real heat capacity entropy can be obtained.

The invention discloses a theoretical combustion temperature prediction method and device for a blast-furnace tuyere. The method comprises the steps that input material parameters, input material types and output material types of a rotation area are obtained; determining the amount of substance of an output substance based on the input substance parameter, the output substance type, coke consumption and a plurality of chemical reaction paths; determining total chemical reaction heat based on the input material parameters and the plurality of chemical reaction paths; based on the amount of substance of the input substance, the total chemical reaction heat, the input substance parameters, the amount of substance of the output substance, the phase change latent heat, the solid crystal transition heat and a pre-established molar constant pressure heat capacity model, determining the theoretical combustion temperature of the convolution area; according to the method, accurate modeling of the thermodynamic process of the gyration area and high-precision calculation of the combustion temperature under the condition of multiple injection media can be achieved, and the accuracy and applicability of energy balance analysis of the blast-furnace tuyere gyration area are improved.

The invention discloses a hammer forging forming method of a GH4169 alloy turbine front sealing disc forge piece, and belongs to the technical field of metal plastic processing. The method comprises the steps of blank making, stepped heating, hammer forging forming and heat treatment. According to the hammer forging forming, a blank is transferred to a mold preheated to be larger than or equal to 425 DEG C within 50 seconds or less, and specific three-stage hammering is carried out, wherein initial hammering with 50% energy is carried out twice; then hammering for 16-19 times at the rhythm of'yo-yo-yo-hit 1 'at the interval of 4-6 seconds at 100% energy; and finally, carrying out 100% energy continuous click for 8-12 times. And the total forging time is controlled to be 100-120 seconds. Through cooperative control of the transfer time, the hammering rhythm, the hammering times and the total time, the thermodynamic process of the core and the surface of the forged piece is effectively balanced, and the technical problems that when the GH4169 alloy is subjected to hammer forging, grains of the core are coarse due to reverse heat, and mixed crystals are generated on the surface due to temperature drop are successfully solved; the total cross-section grain size of the high-quality forge piece is larger than or equal to 8 grades, and coarse grains do not exist on the surface.