Acoustic temperature measurement in a rocket noise field.
A 1 μm diameter platinum wire resistance thermometer has been used to measure temperature fluctuations generated during a static GEM-60 rocket motor test. Exact and small-signal relationships between acoustic pressure and acoustic temperature are derived in order to compare the temperature probe output with that of a 3.18 mm diameter condenser microphone. After preliminary plane wave tests yielded good agreement between the transducers within the temperature probe's ∼2 kHz bandwidth, comparison between the temperature probe and microphone data during the motor firing show that the ±∼3 K acoustic temperature fluctuations are a significant contributor to the total temperature variations.
Department of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, USA. jaromgiraud@gmail.com
Jarom H
JH
Giraud
Kent L
KL
Gee
John E
JE
Ellsworth
D000162:Acoustics / Q000295:instrumentation*; D004867:Equipment Design; D008962:Models, Theoretical; D009624:Noise, Transportation; D017711:Nonlinear Dynamics; D010984:Platinum; D011312:Pressure; D013018:Sound Spectrography; D018531:Spacecraft; D013696:Temperature; D013821:Thermometers; D013997:Time Factors; D014159:Transducers
D010984:Platinum