Bearbeiten von „A Standard for Dynamic Pressure Measurements in Gas Turbines“
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When making dynamic pressure measurements on gas turbines, there are numerous factors to consider; however, this standard focuses on the following critical factors: | When making dynamic pressure measurements on gas turbines, there are numerous factors to consider; however, this standard focuses on the following critical factors: | ||
− | # Dynamic pressure probe types | + | # Dynamic pressure probe types |
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# Measurement location on the turbine, (specifically considering temperature requirements) | # Measurement location on the turbine, (specifically considering temperature requirements) | ||
# Measurement requirements, such as frequency response, accuracy, etc. | # Measurement requirements, such as frequency response, accuracy, etc. | ||
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'''Capacitive Response to Temperature (CRT)''' The relationship between temperature and capacitance change of the pressure transducer. Temperature response may be compensated for by signal conditioning electronics, and possibly with the addition of a temperature transducer integrated into the pressure sensor system. | '''Capacitive Response to Temperature (CRT)''' The relationship between temperature and capacitance change of the pressure transducer. Temperature response may be compensated for by signal conditioning electronics, and possibly with the addition of a temperature transducer integrated into the pressure sensor system. | ||
− | + | ===Piezoelectric Specific Definitions=== | |
'''Internal Resistance''' The resistance measured across the Sensing Element when a specified DC voltage is applied at Room Conditions unless otherwise stated. | '''Internal Resistance''' The resistance measured across the Sensing Element when a specified DC voltage is applied at Room Conditions unless otherwise stated. | ||
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'''Transient Temperature Error (See ISA 37.2, Section 6.8) or Thermal Shock''' Capability to withstand a change in temperature within a specified time frame, defined as a % of unamplied full scale output (voltage, charge, etc.) shift in output from the pressure transducer when exposed to a thermal transient event quantified in degrees per second. . | '''Transient Temperature Error (See ISA 37.2, Section 6.8) or Thermal Shock''' Capability to withstand a change in temperature within a specified time frame, defined as a % of unamplied full scale output (voltage, charge, etc.) shift in output from the pressure transducer when exposed to a thermal transient event quantified in degrees per second. . | ||
QUESTION: Is this covered in thermal gradient? | QUESTION: Is this covered in thermal gradient? | ||
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