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The rotating packed bed is a new and effective mass transfer equipment. However, because of the complexity fluid flow inside the RPB, the flow experiment are not easy to lead to the deeper understanding on the fluid dynamic in an RPB. To explore the internal flow field distribution of rotating packed bed , the internal flow field in counter-current double packing rotating packed bed was studied. At the same time, the flow field changes in different rotating speed was compared and the liquid distribution between the two layer of packing was performanced.

Rotating packed bed is a new high efficient equipment for multiphase flow transference, it has been widely used in chemical separation and preparation of nano-materials. The gas pressure drop of RPB is one of important indicators which are used to measure performance of RPB. In this paper, the experimental and simulative progress of research on the gas pressure drop at home and abroad in recent years is reviewed. All kinds of gas pressure drop experiments and simulations of counter-flow RPB, cross-flow RPB are introduced and compared, followed with the analysis of the progress, existing problems, the trend and emphasis.

The preliminary study of the three-channel size adjustable coaxial nozzle which was used in supercritical fluid particles preparation technology was given in this paper, what's more, we considered the influence of some experimental conditions on the preparation product, such as pressure, nozzle size. According to the problem of reunion of cefuroxime axetil particles appeared in the preparation process, this paper elaborates the mechanism of reunion, and adopted the method of adding surfactants to solve the reunion problems effectively.

An improved component modal synthesis-based nonproportional mistuning method (ICMS-NPMM) is proposed to investigate mistuned turbine blisks (MTBs) since the high-fidelity finite element models (HFEMs) involve large number of computations, which leads to low calculation efficiency. To reduce degrees of freedom and suppress the flutter of MTB, it is divided into mistuned blade structure and tuned disk structure, and the intentional mistuning is considered. Furthermore, the mistuned parameters, nonproportional mistuning, and complex loads are also considered. Firstly, the basic theory of ICMS-NPMM is investigated; secondly, the model of MTB is established via ICMS-NPMM; finally, the intentionally mistuned design of modal shape amplitudes (MSAs) is investigated via ICMS-NPMM. The results indicate that the calculation efficiency is enhanced via ICMS-NPMM relative to that of via HFEM. In addition, the sensitivity and the flutter are decreased; meanwhile, the amplitude fluctuations of MSAs are distinctly decreased and become comparatively smooth. This investigation provides an important guidance for the vibration characteristic study of complex mechanical structures in engineering practice.