A. Ya. Kuzin

Determination of Kinetic Characteristics of the Process of Drying of Forest Combustibles

An algorithm for determining kinetic characteristics of the process of drying of forest combustibles by the modified Hertz–Knudsen law in isothermal heating has been suggested and tested. It is shown that this algorithm allows obtaining of a stable solution of the inverse kinetic problem of one‐dimensional determination of the heat of evaporation and a pre‐exponential factor with an error proportional to the error of initial experimental data. Kinetic characteristics of the process of drying of certain forest combustibles are determined by the experimental data known from the literature.

Determination of Characteristics of Thin‐Layer Thermoprotective Coatings by Solving Inverse Heat‐ and Mass‐Transfer Problems

Measurement data on unsteady temperature fields in decomposing thermoprotective coatings and on mass losses in a high‐temperature inert‐gas (nitrogen) flow are reported. With the use of analytical and numerical methods for solving boundary and coefficient inverse heat‐ and mass‐transfer problems, thermophysical and kinetic characteristics of thermoprotective materials made by two modifications of chlorosulfonated polyethylene and powdered polypropylene filler are found.

Heat transfer on the surface on a spherically blunted cone exposed to a supersonic spatial flow with injection of a coolant gas

The heat‐transfer processes in a supersonic spatial flow around a spherically blunted cone with allowance for heat overflow along the longitudinal and circumferential coordinates and injection of a coolant gas are studied numerically. The prospects of using highly heat‐conducting materials and injection of a coolant gas for reduction of the maximum temperatures at the body surface are demonstrated. The solutions of the direct and inverse problems in one‐, two‐, and three‐dimensional formulations for different shell materials are compared. The error of the thin‐wall method in determining the heat flux on the heat‐loaded boundary of the body is estimated.

Effect of heat flow on heat‐transfer characteristics for a supersonic spatial flow around a spherically blunted cone

Heat‐transfer processes for a supersonic spatial flow around a spherically blunted cone were studied by solving direct and inverse three‐dimensional problems taking into account heat flow along the longitudinal and circumferential coordinates. It is shown that highly heat‐conducting materials can be used to advantage to decrease the maximum temperatures on the windward side of streamline bodies.

A study of heat-transfer processes in a supersonic flow around a spherically blunted cone with allowance for injection of a gas-cooler

The heat- and mass-transfer processes of a spherically blunted cone and a supersonic air flow are identified by the methods of solving direct and inverse problems with allowance for the heat flow along the contour and the injection of a gas-cooler. The ranges of applicability of the standard one-dimensional approaches and the method of a thin wall for recovering heat fluxes directed toward the body in flow are shown in the entire time period considered.

Solution of inverse problems of the mechanics of reactive media

The general inverse problem of heat and mass transfer in a porous reactive material is reduced to a set of particular problems by using splitting of the problem according to chemical and physical processes. A brief exposition is given of the methods for solving these particular inverse problems.