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Fracture analysis and experimental study of induced draft fan blades under fluctuating flow field
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Sheng ZANG1, Deming SHEN2, Jiangang YANG1
Thermal Power Generation | 2024, 53(12) : 129 - 134
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Thermal Power Generation | 2024, 53(12): 129-134
• Power generation technology forum •
Fracture analysis and experimental study of induced draft fan blades under fluctuating flow field
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Sheng ZANG1, Deming SHEN2, Jiangang YANG1
Affiliations
  • 1.School of Energy and Environment, Southeast University, Nanjing 211189, China
  • 2.Nanjing Sciyon Wisdom Technology Group Co., Ltd., Nanjing 211102, China
Published: 2024-12-25 doi: 10.19666/j.rlfd.202405109
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The calculation analysis and experimental study of blade fracture of a certain type of steam and static adjustable induced draft fan are carried out. Vibration signals and blade natural frequencies of fans at different speeds and openings are obtained through vibration tests and modal experiments. Performance curves of fans at different speeds are drawn according to the similarity theory, and the rotation-opening curves corresponding to the flow rate are obtained. The fan operation restricted zone is delimited by the stall line. The test results show that, when the rotation speed is constant, the amplitude of the blade passing frequency and its harmonic component increase with the stator blade opening. Combining with the modal experiment, it is found that the natural frequency of the blade and the blade passing frequency and its harmonic component coincide when the fan runs in the rotation speed range of 796~912 r/min, resulting in blade resonance. The fan should avoid running in the resonance speed range and avoid running in the speed restricted area.

steam induced draft fan  /  blade fracture  /  air pulsation  /  blade passing frequency  /  operation characteristics
Sheng ZANG, Deming SHEN, Jiangang YANG. Fracture analysis and experimental study of induced draft fan blades under fluctuating flow field[J]. Thermal Power Generation, 2024 , 53 (12) : 129 -134 . DOI: 10.19666/j.rlfd.202405109
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Year 2024 volume 53 Issue 12
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doi: 10.19666/j.rlfd.202405109
  • Receive Date：2024-05-29
  • Online Date：2026-03-06
  • Published：2024-12-25
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  • Received：2024-05-29
Affiliations
    1.School of Energy and Environment, Southeast University, Nanjing 211189, China
    2.Nanjing Sciyon Wisdom Technology Group Co., Ltd., Nanjing 211102, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202405109
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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