Cai Ruixian specializes in energy utilization and engineering thermophysics. When analyzing the complex total energy system, Cai Ruixian founded the comparison method, thus summarizing various concise qualitative laws of various total energy systems; The theoretical system of thermodynamic analysis focusing on correct evaluation criteria is established, and a series of new reasonable standards and systematic analysis are put forward. In the theory of turbomachinery, the central streamline method has been fully developed, and some of its contents have been included in textbooks at home and abroad; In the three-dimensional flow theory of turbomachinery, firstly, the constraint conditions of annular wall are derived and a series of three-dimensional standard analytical solutions are given. For the first time, the influence of inner shroud on the unstable performance of axial-flow compressor was found in the actual unit, which played an important role in the debugging of various types of units in China. A series of algebraic explicit analytical solutions of engineering thermophysics are derived, such as unsteady compressible flow with shock wave and nonlinear heat conduction.

Research direction and achievements: Long-term research in the fields of turbine machinery, gas turbine, thermal cycle and total energy system. In the aerothermodynamic of turbomachinery, the center streamline method of Professor Wu Zhonghua is fully developed, and the annular wall constraint condition is put forward in the three-dimensional flow theory of turbomachinery. In the thermal analysis of total energy system, the school of comparative method and evaluation standard was established, a series of brand-new conclusions were drawn, and the fallacies of some authoritative works were pointed out, which was publicly recognized by international authorities. Theoretically, several analytical solutions of different disciplines in engineering thermophysics are given. In the development of domestic gas turbine, the influence of the inner ring of axial compressor on its surge was discovered for the first time in the world, which played a great role in the debugging and anti-surge of this unit and several domestic compressors in the future. In addition, the rotor bending problem is solved and a new design and calculation method is proposed. He presided over the completion of the national climbing project 1 and the national 973 project 1, and published more than 400 papers in important journals at home and abroad.

Publication time of monograph Book Name Book Author Publishing House 1964 Analytical Solution of Center Streamline Method of Plane Cascade —— Some Development of Center Streamline Method Cai Ruixian Editor-in-Chief Tsinghua University Gas Turbine Teaching and Research Group 2002 Thermal Manual Ren Zepei Cai Ruixian Editor-in-Chief Mechanical Industry Publishing House 2009 Cai Ruixian Selected Works Cai Ruixian Tsinghua University Journal Publishing House Time Document Name Author Journal Name 20 12 China Energy Basic Understanding, Cai Ruixian Science and Technology Herald, (No.13) Strict analytical solution of basic equations of thermal machinery in 2009, Journal of Cai Ruixian Mechanical Engineering, (No.3) Strict and concise analytical solution of one-dimensional unsteady state after non-Darcy seepage peak of rock in 2009; Algebraic explicit analytical solution of one-dimensional unsteady thermoacoustic flow in ideal gas in 2008 by Cai Ruixian Li Yuanyuan and Jiang Runhua; Journal of Engineering Thermophysics (No.4) by Cai Ruixian and Liu Qibin; A new method for solving analytical solution of mathematical equation in 2008: mixed separation variable method by Cai Ruixian and Liu Qibin. Algebraic explicit analytical solution of one-dimensional unsteady thermoacoustic flow in ideal gas in 2008 Cai Ruixian and Liu Qibin Journal of Engineering Thermophysics (No.4) in 2008. The energy power system should be in harmony with the environment [Cai Ruixian, Jin and Lin Rumou's personal opinions on the development of renewable energy in 2007, algebraic explicit analytical solution of unsteady non-Newtonian vortex in the loop of China Science Foundation of Zhang Guoqiang (3) 2006, Thinking of China Science Series G (No.4) 2005 Distributed Energy System Cai Ruixian, Science and Technology Herald (No.9) 2005 Analytical Solution of Brinchmann Model Considering Anisotropic Natural Convection in Porous Media (II), Gou, China Science Series G (No.2) 2004 Analytical Solution of Unsteady Geometric One-dimensional Flow Considering Cyclones Cai Ruixian Journal of Engineering Thermophysics (No.4) 2004 Strengthening Energy Saving Measures to Ensure Sustainable Economic and Social Development Cai Ruixian. Chen Yiqun (7th Session) 2003 Cai Ruixian (8th Session). 2003 A set of algebraic explicit analytical solutions to the basic equations of heat and mass transfer in porous media with wet capillaries Cai Ruixian, Journal of Mechanical Engineering of Zhang Na (6th Session) 2003 Algebraic explicit analytical solutions to the coupled equations of heat and mass transfer in the rapid drying process of porous media Cai Ruixian, Zhang Na Journal of Engineering Thermophysics (No.2) 2003 Algebraic Explicit Analytical Solution of the Basic Equation of Coupled Natural Convection of Temperature and Concentration Gradient in Porous Media; Progress of Natural Science in Cai Ruixian, Zhang Na and Vivienne Liu (No.8) 2002 Key Scientific Issues of Energy Utilization and Environmental Protection in Western China Cai Ruixian Petroleum Knowledge (No.2) 2002 We should be extremely cautious when determining the evaluation criteria of scientific research. Journal of China Academy of Sciences, Cai Ruixian (No.5) 2002 Some Explicit Analytical Solutions of Unsteady Heat Conduction Equation with Variable Thermophysical Properties Cai Ruixian, Journal of Zhang Na Engineering Thermophysics (No.0/-3) 2002 Analytical Solutions of Unsteady Axisymmetric Heat Conduction Equation with Variable Thermophysical Properties in Cylindrical Coordinate System Cai Ruixian, Progress of Natural Science in Zhang Na (No.1 1) 2002 Explicit Wave Analytical Solution of Unsteady Friction, Heat Transfer and One-dimensional Flow in Ideal Gas Cai Ruixian, Zhang Na China Science (Series E) (No.1-3) 2002 Explicit Wave Analytical Solution of One-dimensional Flow with Heat Transfer in Unsteady Ideal Gas Cai Ruixian, Zhang Na China Science. Analytical Solution of Brinkman Model for Natural Convection in Porous Media Cai Ruixian, Zhang Na China Science (Series A) (No.1-6) 200 1 Cai Ruixian. Derivation of explicit analytical solution of nonlinear equation of unsteady compressible isentropic flow. Journal of Engineering Thermophysics (No.1-6) 200 1 Further Thoughts on the Design and Application of Counter-rotating Turbine Foundation, Journal of Aerospace Dynamics, Cai Ruixian (No.3) 200 1. Some Explicit Analytical Solutions of Two-phase Unsteady Flow Cai Ruixian, Journal of Mechanical Engineering (No.9) 200 1 Explicit Analytical Wave Solutions of Unsteady 1d Ideal Gas Flow Considering Friction and Heat Transfer Cai Ruixian, Zhang Na China Science (No.4) 2000, A Group of Explicit Analytical Solutions of Dynamic Process of Boiler Heating Surface Cai Ruixian, Journal of Mechanical Engineering (No.7) 2000 Some Analytical Solutions in Engineering Thermophysics Cai Ruixian, Cai Dang Journal of Xi Jiaotong University (No.2) 2000 Explicit Analytical Solutions of Coupled Differential Equations of Porous Materials Drying Cai Ruixian, Natural Science Progress in Zhang Na (No.2) 2000 Explicit Analytical Solution of Coupling Difference; Natural Science Progress in Cai Ruixian and Zhang Na (No.2) 1999 Research on aerothermodynamic Frontier Problems and New Design System in Energy Utilization: Main Research Progress 1998 Basic Research in Cai Ruixian (No.3) 1999 Coupling of Heat and Mass Transfer of Dry Porous Materials. Progress of natural science in Zhang Na (No.10)/One-dimensional algebraic explicit analytical solution of Fourier heat conduction in a sphere (No.1999), One-dimensional algebraic explicit analytical solution of natural science in Zhang Na, Progress of natural science (No.1) 1997 A set of explicit analytical solutions of unsteady shock wave flow in an ideal gas with variable cross section (No. 1998 Research on aerothermodynamic Frontier Problems and New Design System in Energy Utilization: Three-year Major Research Progress in Basic Research of Cai Ruixian Climbing Project (Phase III) 1998 One-dimensional Unsteady Analytical Solution of Basic Equation of Biological Heat Conduction in Cai Ruixian, Zhang Na. Progress in Natural Science: Newsletter of State Key Laboratory (No.3) 1998 Progress in Natural Science of Unsteady One-dimensional Analytical Solution of Cai Ruixian in Zhang Na (No.6)/Analytical Solution of Viscous Compressible Flow in Ideal Gas/Journal of Engineering Thermophysics of Cai Ruixian and Zhu Yongbo (No.0/-6) 1 Typical Off-design Characteristics of 998 Single-shaft Constant-speed Gas Turbine and its Cogeneration Device: Journal of Engineering Thermophysics in Cai Ruixian and Zhang Na (No.65438 +0-6)/CLOC-0/998 Explicit Analytical Solution of Non-Fourier Heat Conduction Equation of Cai Ruixian IC Chip (No.65438 +0-24)/CLOC-0/ 997 Evaluation index and optimization direction of renewable energy power plants: Some unsteady analytical solutions of heat transfer and friction flow in Journal of Solar Energy of Cai Ruixian (No.65438 +0-4) 1996 and Cai Ruixian Journal of Engineering Thermophysics (No.1-4) 1996: Research progress of frontier problems in aerothermodynamic and new design system of energy utilization; Cai Ruixian Basic Research (No.4) 1996 Discussion on the magnitude of fines for tail gas pollution Journal of China Soft Science, Cai Ruixian (No.2) 1995 Unsteady One-dimensional Analytical Solution of Bicai Sharp Scientific Bulletin (English version) (No.1 19). 19951summary report of attending international academic conference abroad in June 1995 (according to the project outline of the national natural science foundation)/brief introduction of Cai Ruixian gas turbine technology (phase III)1995 Cai Ruixian performance of typical combined cycle. Journal of Engineering Thermophysics (No.1-4). 1995 Analytical Solution of One-dimensional Unsteady Biological Heat Transfer Equation Cai Ruixian Science Bulletin (No.7-24) 1994 Basic Analysis of Typical Basic Components of Axial-flow Counter Cyclone Cai Ruixian Fluid Machinery (No.0/2) 1994 Concise Estimation Formula for Performance of Design Point of Exhaust Combustion Combined Cycle Cai Ruixian Journal of Engineering Thermophysics (No.1/KLOC) Preliminary study on optimal efficiency of gas turbine power plant (calculation example of profile loss of turbine plane cascade in Cai Ruixian (Phase 5) (1994) and gas turbine technology (Phase 3) Analytical solution of one-dimensional unsteady compressible ideal gas with equal entropy change cross section flow; Cai Ruixian Journal of Engineering Thermophysics (No.1-4) 1993 Influence of afterburning on the efficiency of conventional combined cycle: Cai Ruixian Journal of Engineering Thermophysics (No.3) 1993 Automatic Design Program for Cai Ruixian Special Blade Profile of Counter-rotating Turbine. Wei Xinglu Journal of Aerospace Dynamics (No.2) 1992 Basic Analysis of Counter-rotating Turbine Journal of Cai Ruixian Aviation (Series A) (No.1 1 issue) 1992 Analytical solution of isentropic flow of ideal gas with variable cross section. Science bulletin (No.9-24) 1992 Three kinds of counter-rotating turbines and their basic analysis, Journal of Wei Xinglu Aerospace Power (No.1 1 992)/Automatic design program of turbine cascade, Journal of Engineering Thermophysics (No.1 1-4)/KLOC-0. Engineering Solution of the Complete Inverse Problem of kloc-0/988 Axial Cascade; Fast Engineering Solution of Poisson Equation in Double Connected Region in Journal of Engineering Thermophysics of Cai Ruixian (No.65438 +0-4); Bulletin of Cai Ruixian Science. 1987 evaluation standard of cogeneration and basic analysis of gas turbine; Cai Ruixian Journal of Engineering Thermophysics (No.1-4) 1987 Evaluation Criteria for Cogeneration of Heat and Power and Basic Analysis of Gas Turbine; Cai Ruixian Journal of Engineering Thermophysics (No.:1-4). 1986 Practical Scientific Bulletin of ST, Zhang, Yan Genshou and Lin Rumou (English version) (No.21issue) 1986 Approximate concise thermodynamic relation of actual cycle thermal efficiency of steam injection gas turbines, Scientific Bulletin of Zhang, Yan Genshou and Lin Rumou (No.6)1. Kloc-0/-4) 1984 Developing total energy system is an effective way to improve the level of energy utilization. Cai Ruixian Energy Conservation (No.8) 1984 Some analytical solutions to verify the three-dimensional numerical solution of turbomachinery (Journal of Sun Chunlin Engineering Thermophysics, Jiang Hongde, Cai Ruixian (No.1 1983S _ 1s, Cai Ruixian China Science (No. 1982 constraints of design variables of turbomachinery on inner and outer ring walls and warping of flow surface of axial-flow turbomachinery S 1 Cai Ruixian China science (No.7- 12) 1982 gas turbine starting and compressor low-speed characteristics Cai Ruixian electric power engineering (No.5) 1982. Constraints of turbine design variables on inner and outer ring walls and warping of flow surface of axial flow turbine S 1. China science (series a) (No.7-12)1981approximate thermodynamic analysis of combined cycle of gas-steam turbine and waste heat boiler (No.6544) 198 1 computer program and inverse problem of plane cascade center streamline method. Journal of Shen Engineering Thermophysics (No.1-4) 1980 Transonic Calculation Wu Bujing Journal of Engineering Thermophysics (No.1-4) 1979 Design of Axial-flow Turbine Cascades on Arbitrary Revolving Surfaces-Some Development of Central Streamline Method: Journal of Mechanical Engineering, Cai Ruixian (2008) Some Developments of the Central Streamline Method for Solving Axisymmetric Flow in Channels —— Journal of Cai Ruixian Mechanical Engineering (1966 Analytical Solution of the Central Streamline Method for Planar Cascades (II) —— Some Developments of the Central Streamline Method (I) Discussion on the Calculation Formula of Fuel Required for Combustion Chamber and Afterburner to Produce Gas at a Given Temperature; Journal of Cai Ruixian Mechanical Engineering (No.1) 1 964 Journal of Mechanical Engineering of Cai Ruixian (No.3) 1958 1958 (No.:12) Mr. Cai played an important role in post-doctoral policy consultation and evaluation in Tsinghua University 16. He has instructed many candidates for the Hundred Talents Program, postdoctoral fellows and dozens of graduate students, received the guidance, doubts and help of Academician Cai, and won the title of excellent graduate tutor of Chinese Academy of Sciences for many times.

Teacher Cai has trained many elite successors and students in the United States, Canada and China, and supervised more than doctoral students 10, and more than master students 10, among which 3 people won the "Dean Award of China Academy of Sciences". After graduation, four students directly taught by Academician Cai were rated as academicians, of whom more than a dozen grew up to be national and ministerial cadres, more than a dozen researchers or professors, and chief engineers of many companies or factories.