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中文摘要：
气固两相同轴射流因可促进相间的传质传热性能而广泛应用于能源、化工、航天、环保等领域，如煤气化过程中常伴随气固两相同轴射流。由于气固两相同轴射流应用的广泛性，众多学者对其进行了研究。如Park等采用LDA对玻璃微珠粒径为40μm的气固两相同轴射流进行了研究，分析了不同颗粒质量分数对气相流场的影响，
英文摘要：
The particle dispersion characteristics of the dense gas-solids two phase coaxial jets were investigated with high-speed camera. The results showed that with increasing gas velocity, three particle dispersion modes were observed： shear dispersion, wave dispersion and oscillating dispersion, after the particle flow passed through the intact length. The normalized intact length decreased with increasing gas velocity. For the wave dispersion, the unstable wavelength increased linearly with axial distance at different gas velocities. For the oscillating dispersion, oscillating frequency decreased at first and then increased with increasing gas velocity, so the oscillating frequency had a minimum when the gas velocity was about 65 m · s^-1.
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