Preface

Nomenclature

Mathematical Description of Thermal Hydraulic Processes in Complex-Geometry Channels

Design Features of Heat Exchangers with Twisted Tubes and Porous Heat Transfer Elements

Initial System of Equations

Structural Features of Turbulent Flow in a Twisted Tube Bundle Allowing Simplification of its Mathematical Description

Systems of Equations for Thermal Hydraulic Processes in Twisted Tube Bundles. Calculated Flow Models

Specific Features of Numerical Modeling of Thermal Hydraulic Processes in Channels with PHE and Radial Flow

Dimensionless Relations for Transfer Coefficients Entering into the Motion and Energy Equations

Numerical Modeling of Steady Thermal Hydraulic Processes

Numerical Analogs of the Initial Systems of Equations for Flow in Twisted Tube Bundles

Writing Numerical Analogs of the Initial Equations at a Singular Point

Reducing Numerical Analogs of the Initial Equations to Vector-Matrix Form

Solving the Equations Using Matrix Factorization

Algorithm of Realizing the Predictive Technique

Structure of the RAPTIS Computation Program and its Potentialities

Description of the RAPTIS Program

Analysis of the Computation Error for the RAPTIS Program

Account of Edge Effects

Method of Solving the System of Equations for a Heat Exchanger with PHE. Finite-Difference Analogs of the Initial Equations

Solution Algorithm and Realization of Boundary Conditions

Examples of Numerical Calculations

Experimental Determination of Thermal Hydraulic Characteristics in Twisted Tube Bundles

Description of Experimental Setup, the Procedure of Processing Experimental Data for Heat Transfer and Hydraulic Resistance, and the Computation Programs

Results of Studying Heat Transfer. Empirical Relations for Calculating Heat Transfer

Results of Studying the Hydraulic Resistance. Empirical Relations for the Hydraulic Resistance Coefficient

Experimental Substantiation of Predictive Methods for Steady Heat Transfer Processes in Twisted Tube Bundles

Experimental and Data Processing Procedures. Statistical Analysis of the Results and Description of the Computation Program

Experimental Substantiation of the Physical Flow Model and Predictive Methods

Effect of the Shape of an Axisymmetric Heat Supply Nonuniformity on Transfer Coefficients

Effect of the Shape of an Asymmetric Heat Supply Nonuniformity on the Transfer Coefficient

Generalization of Experimental Data for Interchannel Mixing of the Heat-Transfer Fluid. Closing Similarity Equations

Numerical Modeling of Unsteady Thermal Hydraulic Processes in Twisted Tube Bundles

Selection of a Method for Solving the Initial System of Equations. Numerical Analogs

Solution Algorithm for a Transient Problem and Realization of Boundary Conditions

Quasi-Stationary Approximation and Methods of Solving the Problem

Structure and Capabilities of the DINA Program

Results for Unsteady Thermal Hydraulic Processes Computed by the DINA Program

Solution of the System of Three-Dimensional Transient Equations

Experimental Validation of Predictive Methods for Unsteady Heat and Mass Transfer in Twisted Tube Bundles

Distinctive Features of the Experimental Procedure for Studying Unsteady Heat and Mass Transfer. Description of an Experimental Setup

Effect of the Heat Load Variations on the Measured Temperature Fields of the Heat-Transfer Fluid. Experimental Validation of Predictive Methods

Heat and Mass Transfer with Variations in the Heat Load. Closing Empirical Relations

Heat and Mass Transfer with Variations in the Flow Rate of the Heat-Transfer Fluid. Empirical Relations for Closing the System of Equations

Specific Features of the Heat and Mass Transfer with Periodic Time Variations in the Flow Rate of the Heat-Transfer Fluid

Transient Temperature Fields of the Heat-Transfer Fluid for Asymmetric Heat Release Nonuniformity

Engineering Predictive Methods for Thermal Hydraulic Processes in Heat Exchangers

Calculation Steps for a Twisted-Tube Heat Exchanger

Calculation of a Twisted-Tube Heat Exchanged with Steady Operating Conditions. Scheme of the Computation Program

Taking Account of the Interchannel Mixing of the Heat-Transfer Fluid in the Intertubular Space of a Heat Exchanger. Scheme of the Computation Program and its Description

Computation of Transient Temperature Fields in Twisted Tube Bundles with a Nonuniform Heat Supply. Scheme of the Computation Program and its Description