This paper discusses the modeling design and accuracy analysis of a single stage steam centrifugal compressor for China′S first seawater desalinization plant, and gives a brief presentation on the closed loop vapou...This paper discusses the modeling design and accuracy analysis of a single stage steam centrifugal compressor for China′S first seawater desalinization plant, and gives a brief presentation on the closed loop vapour test platform designed and constructed for qualification of the compress or for performance and operational reliability, and results of tests run with the compressor. Both tests and actual operation show the modeling design is successful, and the compressor achieved and exceeded what was expected in performance. The seawater desalinization plant has run with excellent performance and reliability for several years for the national seawater desalinization demonstration program. This proves it is practical and practicable to develop and design China′s steam centrifugal compressors in series from air centrifugal compressors by maintaining equal specific volume ratio at both inlet and outlet of the compressor.展开更多
In order to shorten the design period, the paper describes a new optimization strategy for computationally expensive design optimization of turbomachinery, combined with design of experiment (DOE), response surface mo...In order to shorten the design period, the paper describes a new optimization strategy for computationally expensive design optimization of turbomachinery, combined with design of experiment (DOE), response surface models (RSM), genetic algorithm (GA) and a 3-D Navier-Stokes solver(Numeca Fine). Data points for response evaluations were selected by improved distributed hypercube sampling (IHS) and the 3-D Navier-Stokes analysis was carried out at these sample points. The quadratic response surface model was used to approximate the relationships between the design variables and flow parameters. To maximize the adiabatic efficiency, the genetic algorithm was applied to the response surface model to perform global optimization to achieve the optimum design of NASA Stage 35. An optimum leading edge line was found, which produced a new 3-D rotor blade combined with sweep and lean, and a new stator one with skew. It is concluded that the proposed strategy can provide a reliable method for design optimization of turbomachinery blades at reasonable computing cost.展开更多
Cylinder valves are the most important parts of a reciprocating compressor; their working condition affects the safety and operation of the reciprocating compressor directly. In initial design, it is dedicated to simu...Cylinder valves are the most important parts of a reciprocating compressor; their working condition affects the safety and operation of the reciprocating compressor directly. In initial design, it is dedicated to simulate the behaviour of a reciprocating compressor and peorformance of cylinder valves. For hydrogen application, it is considering carefully the real operating conditions both from the dynamic point of view and taking care of the effective condi- tions of the gas purity. The dynamic aspects of the design are related to the mechanical behaviour and to the conse- quent fatigue. The mathematical models are able to determine the ring displacement and the flow and pressure drop of the gas. Instruments are available for on-line monitoring of the reciprocating compressor. The various parts have to be repaired in time in case they have abrupt problems during the operating period. By detail design and maintenance, saving the quantities of spare parts, the reciprocating compressor of the plant can be running smoothly. Actually, the cylinder valves can be used nearly three years.展开更多
The structural design of the IND100 axial compressor requires a multistage interrelationship between the thermodynamic, aerodynamic, mechanical design and structural integrity analysis of the component. These design c...The structural design of the IND100 axial compressor requires a multistage interrelationship between the thermodynamic, aerodynamic, mechanical design and structural integrity analysis of the component. These design criteria, sometimes act in opposition, hence engineering balance is employed within the specified design performance limits. This paper presents the structural and conceptual design of a sixteen stage single shaft high pressure compressor of IND100 with an overall pressure ratio of 12 and mass flow of 310 kg/s at ISOSLS conditions. Furthermore, in order to evaluate the conceptual design analysis, basic parameters like compressor sizing, load and blade mass, disc stress analysis, bearings and material selections, conceptual disc design and rotor dynamics are considered using existing tools and analytical technique. These techniques employed the basic thermodynamic and aerodynamic theory of axial flow compressors to determine the temperature and pressure for all stages, geometrical parameters, velocity triangle, and weight and stress calculations of the compressor disc using Sagerser Empirical Weight Estimation. The result analysis shows a constant hub diameter annulus configuration with compressor overall axial length of 3.75 m, tip blade speed of 301 m/s, maximum blade centrifugal force stress of 170 MPa, with major emphasis on industrial application for the structural component design selections.展开更多
Centrifugal compressors with parallel-wall and contracting wall vaneless diffuser are designed by using centrifugal compressor computer-aided integrated design system. The internal flow fields of the compressor are ca...Centrifugal compressors with parallel-wall and contracting wall vaneless diffuser are designed by using centrifugal compressor computer-aided integrated design system. The internal flow fields of the compressor are calculated by solving three-dimensional Navier-Stokes equation. Four aspects are investigated and calculation results show that the total efficiencies and total pressure ratios of the compressor with contracting wall vandess diffuser is higher than that of the compressor with parallel-wall. The jet and wake don＇t mix rapidly inside vandess diffuser. The outlet blade lean angle doesn＇t affect the compressor performance. The greater the mass flow rate through impeller, the more uneven the velocity distribution at impeller outlet is.展开更多
根据超临界二氧化碳(supercritical carbon dioxide,SCO_(2))的物性特点,调用美国国家标准技术研究所(national institute of standards and technology,NIST)发布的二氧化碳物性参数,开发了SCO_(2)离心压缩机一维设计及性能预测的程序...根据超临界二氧化碳(supercritical carbon dioxide,SCO_(2))的物性特点,调用美国国家标准技术研究所(national institute of standards and technology,NIST)发布的二氧化碳物性参数,开发了SCO_(2)离心压缩机一维设计及性能预测的程序。利用该程序完成了-10 MW SCO_(2)布雷顿循环发电系统中的分流压缩机气动设计以及不同转速下的性能预测,并结合数值计算与流场分析,结果表明:在设计转速下,一维预测结果与三维数值模拟所得的压气机性能结果在小流量区域变化趋势与数值大小吻合较好,但是在堵塞工况点附近两者存在一定的偏差。在其他转速下,一维预测结果与三维数值模拟所得的压气机性能结果吻合较好,表明该一维性能预测能较好预测SCO_(2)离心压缩机的变工况运行特性。展开更多
文摘This paper discusses the modeling design and accuracy analysis of a single stage steam centrifugal compressor for China′S first seawater desalinization plant, and gives a brief presentation on the closed loop vapour test platform designed and constructed for qualification of the compress or for performance and operational reliability, and results of tests run with the compressor. Both tests and actual operation show the modeling design is successful, and the compressor achieved and exceeded what was expected in performance. The seawater desalinization plant has run with excellent performance and reliability for several years for the national seawater desalinization demonstration program. This proves it is practical and practicable to develop and design China′s steam centrifugal compressors in series from air centrifugal compressors by maintaining equal specific volume ratio at both inlet and outlet of the compressor.
文摘In order to shorten the design period, the paper describes a new optimization strategy for computationally expensive design optimization of turbomachinery, combined with design of experiment (DOE), response surface models (RSM), genetic algorithm (GA) and a 3-D Navier-Stokes solver(Numeca Fine). Data points for response evaluations were selected by improved distributed hypercube sampling (IHS) and the 3-D Navier-Stokes analysis was carried out at these sample points. The quadratic response surface model was used to approximate the relationships between the design variables and flow parameters. To maximize the adiabatic efficiency, the genetic algorithm was applied to the response surface model to perform global optimization to achieve the optimum design of NASA Stage 35. An optimum leading edge line was found, which produced a new 3-D rotor blade combined with sweep and lean, and a new stator one with skew. It is concluded that the proposed strategy can provide a reliable method for design optimization of turbomachinery blades at reasonable computing cost.
文摘Cylinder valves are the most important parts of a reciprocating compressor; their working condition affects the safety and operation of the reciprocating compressor directly. In initial design, it is dedicated to simulate the behaviour of a reciprocating compressor and peorformance of cylinder valves. For hydrogen application, it is considering carefully the real operating conditions both from the dynamic point of view and taking care of the effective condi- tions of the gas purity. The dynamic aspects of the design are related to the mechanical behaviour and to the conse- quent fatigue. The mathematical models are able to determine the ring displacement and the flow and pressure drop of the gas. Instruments are available for on-line monitoring of the reciprocating compressor. The various parts have to be repaired in time in case they have abrupt problems during the operating period. By detail design and maintenance, saving the quantities of spare parts, the reciprocating compressor of the plant can be running smoothly. Actually, the cylinder valves can be used nearly three years.
文摘The structural design of the IND100 axial compressor requires a multistage interrelationship between the thermodynamic, aerodynamic, mechanical design and structural integrity analysis of the component. These design criteria, sometimes act in opposition, hence engineering balance is employed within the specified design performance limits. This paper presents the structural and conceptual design of a sixteen stage single shaft high pressure compressor of IND100 with an overall pressure ratio of 12 and mass flow of 310 kg/s at ISOSLS conditions. Furthermore, in order to evaluate the conceptual design analysis, basic parameters like compressor sizing, load and blade mass, disc stress analysis, bearings and material selections, conceptual disc design and rotor dynamics are considered using existing tools and analytical technique. These techniques employed the basic thermodynamic and aerodynamic theory of axial flow compressors to determine the temperature and pressure for all stages, geometrical parameters, velocity triangle, and weight and stress calculations of the compressor disc using Sagerser Empirical Weight Estimation. The result analysis shows a constant hub diameter annulus configuration with compressor overall axial length of 3.75 m, tip blade speed of 301 m/s, maximum blade centrifugal force stress of 170 MPa, with major emphasis on industrial application for the structural component design selections.
文摘Centrifugal compressors with parallel-wall and contracting wall vaneless diffuser are designed by using centrifugal compressor computer-aided integrated design system. The internal flow fields of the compressor are calculated by solving three-dimensional Navier-Stokes equation. Four aspects are investigated and calculation results show that the total efficiencies and total pressure ratios of the compressor with contracting wall vandess diffuser is higher than that of the compressor with parallel-wall. The jet and wake don＇t mix rapidly inside vandess diffuser. The outlet blade lean angle doesn＇t affect the compressor performance. The greater the mass flow rate through impeller, the more uneven the velocity distribution at impeller outlet is.
文摘根据超临界二氧化碳(supercritical carbon dioxide,SCO_(2))的物性特点,调用美国国家标准技术研究所(national institute of standards and technology,NIST)发布的二氧化碳物性参数,开发了SCO_(2)离心压缩机一维设计及性能预测的程序。利用该程序完成了-10 MW SCO_(2)布雷顿循环发电系统中的分流压缩机气动设计以及不同转速下的性能预测,并结合数值计算与流场分析,结果表明:在设计转速下,一维预测结果与三维数值模拟所得的压气机性能结果在小流量区域变化趋势与数值大小吻合较好,但是在堵塞工况点附近两者存在一定的偏差。在其他转速下,一维预测结果与三维数值模拟所得的压气机性能结果吻合较好,表明该一维性能预测能较好预测SCO_(2)离心压缩机的变工况运行特性。
