The Optimal Design of a Wind Tunnel Model Sting System Based on the CFD Method

Li, Shuai; Liu, Dawei; Li, Qiang

doi:10.18280/ijht.330417

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…For accuracy, the structured quadrilateral units of the calculation domain were refined with strict size control. Then, the grid independent test was performed by refining the grids into the final pattern to check the convergence of the calculated results relative to spatial resolution [27]. Based on the static pressure along the nozzle axis, the test was carried out using four sets of grids.…”

Section: Modelling and Meshingmentioning

confidence: 99%

Evaluating the cleaning performance of rectangular slot nozzle and diffuser

Li¹,

Hao²,

Zhang³

2018

IJHT

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This paper aims to disclose how the pulse gas performance is affected by the configurations of the rectangular slot nozzle and the cake-pie type diffuser. To this end, the pulse gas performance of the nozzle was evaluated through several simulations based on the computational fluid dynamics (CFD). Specifically, the author briefly introduced the nozzle and the diffuser, the modelling and meshing operations, the governing equations of the CFD, as well as the numerical plan and solution convergence. Then, the simulation model was validated by comparing the simulated results with experimental data. Focusing on the flow field around the nozzle, the effects of nozzle configuration, diffuser configuration and nozzlediffuser distance on pulse gas cleaning were discussed in great details. Through the discussion, the author drew the following conclusions: Obvious shocking waves were observed near the nozzle outlet. The nozzle outlet height has a greater impact on pulse jet cleaning than other nozzle configuration parameters (e.g. nozzle outlet width and nozzle extension width), while the diffuser height has a greater impact on pulse jet cleaning than other diffuser configuration parameters (e.g. diffuser inlet width and inlet-throat distance). The primary, secondary and total masses increased with the height and width of nozzle outlet; as the nozzle extension width grew, the secondary and total masses also increased, but the primary mass stayed the same. The entrainment ratio is negatively correlated with the height and width of nozzle outlet, and positively with nozzle extension width. The primary mass had nothing to do with the diffuser configuration, while the secondary mass, the total mass and the entrainment ratio increased with the diffuser height, the diffuser width and the nozzle-diffuser distance. The research findings provide a valuable theoretical guidance for pulse jet cleaning system of filters.

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Section: Modelling and Meshingmentioning

confidence: 99%

Evaluating the cleaning performance of rectangular slot nozzle and diffuser

Li¹,

Hao²,

Zhang³

2018

IJHT

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“…(11) and Eq. (19). Table 1 shows the details of the test results and Figure 5 shows the change in air flow rate and pressure drop.…”

Section: Sampling Devicementioning

confidence: 99%

Application of Sampling Method Based on Negative Pressure Pneumatic Conveying in Soft Coal Seam

Zhang¹,

Wei²,

Wang³

et al. 2016

IJHT

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Accurately determining coalbed gas content is difficult using the existing sampling methods in China. In this paper, the drawbacks of the sampling method based on positive pressure pneumatic conveying were analyzed. The sampling method based on negative pressure pneumatic conveying was presented aiming at increasing the coal sampling purity. Furthermore, the two key parameters of power device used during the process were determined using the multi-phase theory. Then, on-site tests were carried out to test the feasibility of the application of the sampling method based on negative pressure pneumatic in the soft coal seam of the Xin'an Coal mine by the self-developed sampling device. The result showed that the effect of drilling pipe rotation on the coal along the hole and poor stability of the hole in the soft coal seam led to low coal sampling purity with positive pressure pneumatic in the sampling method. The sampling method based on negative pressure pneumatic avoided the drawback of the sampling method based on positive pressure with higher coal sampling purity and shorter time consumption. The coal sampling with a length of 50m hole can be achieved within 0.5 min by the negative pressure pneumatic conveying sampling.

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“…Secondly, we consider influence factors of the process of recycling waste products and pollution of the environment in reverse logistics network of remanufacturing supply chain. Finally, improved dual-layer genetic algorithm mechanism was brought up [14][15][16]. We organize the rest of this paper as follows: In Section 2, the model of description and assumptions are presented.…”

Section: Introductionmentioning

confidence: 99%