GBZ44630-2024 English PDF
Basic dataStandard ID: GB/Z 44630-2024 (GB/Z44630-2024)Description (Translated English): Hydraulic machines - Francis turbine pressure fluctuation transposition Sector / Industry: National Standard Classification of Chinese Standard: K55 Classification of International Standard: 27.140 Word Count Estimation: 122,158 Date of Issue: 2024-09-29 Date of Implementation: 2025-04-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GBZ44630-2024: Hydraulic machines - Francis turbine pressure fluctuation transposition---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.GB /Z 44630-2024.Hydraulic machinery Francis turbine pressure pulsation conversion ICS 27.140 CCSK55 Guiding technical documents of the People's Republic of China on national standardization Conversion of Pressure Pulsation of Hydraulic Machinery Francis Turbine (IEC TS62882.2020, IDT) Released on 2024-09-29 2025-04-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III 1 Scope 1 2 Normative references 1 3 Terms, definitions, symbols and units 2 3.1 General terms 2 3.2 Unit 2 3.3 Summary of terms, definitions, symbols and units in this document 2 4 Introduction to pressure pulsation phenomenon 13 4.1 Overview 13 4.2 Overview of pressure pulsation 16 4.3 Overview of Francis Turbine Draft Tube Pressure Pulsation 18 4.4 Detailed introduction to pressure pulsation phenomenon 19 5 Pressure pulsation measurement and analysis methods 24 5.1 General Principles24 5.2 Model turbine pressure pulsation 28 5.3 Prototype turbine pressure pulsation 30 5.4 Analysis, presentation and interpretation of test results 31 6 Confirmation of potential resonances in model test benches and prototypes 33 6.1 General Principles33 6.2 Test bench resonance identification 34 6.3 Possible resonance and self-excited vibration of the prototype 34 7 Conversion method and process 36 7.1 General Principles36 7.2 Parameters affecting conversion 36 7.3 Conversion of related quantities 37 7.4 Convertible pressure pulsation types 37 7.5 Statistical analysis of model and prototype conversion accuracy 38 8 Mitigation measures39 8.1 Draft tube vortex phenomenon 39 8.2 Leaf vortex 41 8.3 Dynamic and static interference 42 8.4 Operating restrictions 42 Appendix A (Informative) Pressure Pulsation Recording Example 43 Appendix B (Informative) Model test typical pressure pulsation sensor parameters 53 Appendix C (Informative) Dynamic Calibration of Pressure Pulsation Sensor 54 C.1 Quick opening valve method54 C.2 Rotary Valve Method 54 C.3 Electric spark method 55 Appendix D (Informative) Remote Pressure Pulsation Measurement Correction 56 D.1 General Principles56 D.2 Correction Method Theory 56 D.3 Measuring and estimating pipeline frequency response 57 D.4 Pressure pulsation correction 58 D.5 Limitations 61 Appendix E (Informative) Forced Response Analysis of Francis Turbine under Partial Load Operation 62 E.1 General Principles62 E.2 Systematic approach based on detailed modelling of hydropower plants 62 E.3 Simplified method based on the hydroacoustic characteristics of hydraulic systems 67 Appendix F (Informative) Effect of Cavitation Coefficient on Pressure Pulsation 74 Appendix G (Informative) Conversion of synchronous pressure pulsation of Francis turbine under off-design conditions 76 G.1 General Principles76 G.2 Summary. Using the local cavitation coefficient to convert the model to the prototype 81 Appendix H (Informative) Statistical Analysis of Pressure Pulsation Data 83 H.1 Normalization for data comparison 83 H.2 Collection of data84 H.3 Draft tube pressure pulsation 84 H.4 Pressure pulsation in bladeless area 90 H.5 Volute inlet pressure pulsation 94 Appendix I (Informative) Collected Pressure Pulsation Mathematics 98 I.1 China's test case98 I.2 French test case99 I.3 Norwegian test case 101 References 102ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is equivalent to IEC TS62882.2020 "Conversion of pressure pulsation for hydraulic machinery Francis turbines". Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Technical Committee for Standardization of Hydraulic Turbines (SAC/TC175). This document was drafted by Harbin Large Electric Machinery Research Institute Co., Ltd., China Institute of Water Resources and Hydropower Research, China Three Gorges Corporation Co., Ltd., Dongfang Electric Corporation, Harbin Electric Motor Factory Co., Ltd., State Grid Hunan Electric Power Co., Ltd. Science Research Institute, China Power Construction Group East China Survey and Design Institute Co., Ltd., State Grid Liaoning Electric Power Co., Ltd. Electric Power Science Research Institute, Yalong River Basin Hydropower Development Co., Ltd., China Water Resources North Survey, Design and Research Co., Ltd., Hubei Energy Group Co., Ltd., Gansu Electric Power Company Electric Power Research Institute, Guizhou Chuangxing Electric Power Research Institute Co., Ltd., Guangxi Power Grid Co., Ltd. Institute of Force Science. The main drafters of this document are. Tan Daqing, Zhang Haiping, Liu Jie, Hu Jiangyi, Chen Jinxia, Tian Haiping, Fang Jie, Xu Yongliang, Wang Wanpeng, Feng Yanmin, Zhang Yong, Zhang Yiyang, Jiang Dezheng, Dong Kaisong, Mao Cheng, Lu Guangling, Zheng Yingxia, Li Haijun, Meng Xiaochao, Dai Jiang, Chen Shunyi, He Chenglian, Zhao Yue, Xun Hongyun, Liu Tingting, and Wang Huanmao. Conversion of Pressure Pulsation of Hydraulic Machinery Francis Turbine1 ScopeThis document provides the conversion method for pressure pulsation under Francis turbine and Francis pump-turbine conditions, including. --- Description of pressure pulsation, phenomena causing pressure pulsation and related issues; ---This document covers pressure pulsation types including but not limited to blade vortex, draft tube vortex and dynamic and static interference between runner and guide vane; ---It shows that the operating conditions and the Thomas number (cavitation coefficient) are the main factors affecting the pressure pulsation; --- Recommended methods for measuring and analyzing pressure pulsation; --- Methods for identifying potential resonances of model test benches and prototypes; --- Determine the method of converting the model test results to the prototype, or provide a statistical or empirical prediction of the pressure pulsation of the prototype. method; --- Recommended pressure pulsation data acquisition system, including the type and installation location of the model and prototype sensors, and the definition of the model and prototype Similar conditions between types; --- A method of presentation for comparing the pressure pulsation measurement results of a model turbine with those of a corresponding prototype turbine is introduced; ---Discusses the parameters used to convert from model to prototype, such as peak-to-peak value, RMS value or standard deviation at 97% confidence level in the time domain. The error is the relationship between the main frequency and the transfer frequency obtained by FFT transformation in the frequency domain; --- The uncertainty of pressure pulsation conversion from model to prototype is discussed; --- The factors that affect the conversion are discussed, including the parts that cannot be simulated on the model test bench, such as the prototype's water delivery system and mechanical system; --- Established the conversion method of different types of pressure pulsation; --- Recommended possible methods to reduce pressure pulsation; ---Defines the limitations of this document. This document is applicable to the unit under normal operating conditions and does not include hydraulic stability related to Karman vortex, transient process, runaway condition and no-load. Qualitative phenomenon. This document provides a method for identifying potential resonances in model test benches and prototypes. It does not involve the conversion of resonance conditions to actual conditions. If resonance exists, the conversion method provided in this document is no longer applicable. In this case, it is impossible to determine the pressure pulsation between the model and the prototype. relation. This document does not deal with the construction details of hydraulic machinery, nor with the mechanical properties of its components, as long as these characteristics do not affect the model pressure pulses. The relationship between the pressure pulsations of the model or prototype.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. IEC 60193.2019 Hydraulic turbines, storage pumps and pump-turbine model acceptance tests Note. GB/T 15613-2023 Acceptance test of turbines, storage pumps and pump-turbine models (IEC 60193.2019, IDT) ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GBZ44630-2024_English be delivered?Answer: Upon your order, we will start to translate GBZ44630-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GBZ44630-2024_English with my colleagues?Answer: Yes. The purchased PDF of GBZ44630-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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