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Tunable diode laser absorption spectroscopy (TDLAS), as a time-resolved in situ and non-intrusive technique which allows combined measurement of selected gas concentration, temperature and velocity, has shown great potential and advantages in ground tests. Recent advances make it increasingly common to use multiple lasers for simultaneous measurements, this is to say, TDLAS have the capability of...
Pentaerythritol (PE) is a solid-solid phase change material with large latent heat. To improve its performance of thermal storage, nano-SiB6 particles were physically mixed into PE as nucleating agent with contents of 1 wt%, 3wt%, 5wt%, respectively. FTIR analysis was performed for pure PE, nano-SiB6 and the composites. The results show that there are no valence bonds between PE and nao-SiB6, and...
An experimental study was carried out to investigate the structural stability of ethylene glycol based titanium dioxide nanoparticle suspensions (nanofluids) prepared with two-step method. Effect of particle concentration, fluid temperature, shear rate and shear duration were investigated. It was found that the temperature resolved thermal conductivity of nano fluid-, followed die trend of the base...
Measurement data for the complex permittivity of seawater at 1.413 GHz for salinities of 30.002 psu, 34.997 psu and 38.274 psu is used to construct a polynomial model function. The coefficients of the polynomial are determined by minimizing the error between the model function and the data in the least square sense. The results are compared with the Klein Swift model function and the differences are...
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