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Wet Compression Performance of a Transonic Compressor Rotor at its Near Stall Point 被引量:3
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作者 杨怀丰 郑群 +2 位作者 罗铭聪 孙兰昕 Rakesh Bhargava 《Journal of Marine Science and Application》 2011年第1期49-62,共14页
In order to study the effects of wet compression on a transonic compressor,a full 3-D steady numerical simulation was carried out under varying conditions.Different injected water flow rates and droplet diameters were... In order to study the effects of wet compression on a transonic compressor,a full 3-D steady numerical simulation was carried out under varying conditions.Different injected water flow rates and droplet diameters were considered.The effect of wet compression on the shock,separated flow,pressure ratio,and efficiency was investigated.Additionally,the effect of wet compression on the tip clearance when the compressor runs in the near-stall and stall situations was emphasized.Analysis of the results shows that the range of stable operation is extended,and that the pressure ratio and inlet air flow rate are also increased at the near-stall point.In addition,it seems that there is an optimum size of the droplet diameter. 展开更多
关键词 wet compression two-phase flow stall boundary transonic compressor
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Clinical experience in treating 78 cases of upper limb edema after breast cancer operation by WenYang HuoXue Washing Prescription
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作者 Hong Chen Xing-Yuan Wang +3 位作者 Bao-Ya Zhao Zhong-Hua Zhang Shuang-Wen Liu Yun-Lan Jiao 《TMR Modern Herbal Medicine》 2018年第4期198-202,共5页
Objective To observe the clinical efficacy and safety of WenYang HuoXue Washing Prescription (WYHX) in the treatment of upper limb edema after breast cancer surgery. Methods: Seventy-eight patients with upper ext... Objective To observe the clinical efficacy and safety of WenYang HuoXue Washing Prescription (WYHX) in the treatment of upper limb edema after breast cancer surgery. Methods: Seventy-eight patients with upper extremity edema after operation of breast cancer with Yin Syndrome were given wet compress with prescription and nursing guidance. The symptom score of affected extremity was observed before and 14 days after treatment, and the total effective rate was evaluated. Results: Twenty-three cases were markedly effective, 41 cases were effective and 14 cases were Invalid. The total effective rate was 82.1%. There was no significant difference between the two groups according to stage I and stage II of edema (P 〉 0.05). Conclusion: WYHX can effectively improve the discomfort symptoms of upper limb edema and cold after breast cancer surgery, and is worthy of clinical application. 展开更多
关键词 WenYang HuoXue Washing Prescription Postoperative of breast cancer Upper limb edema wet compress Clinical experience
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Mechanically induced phase transformation of zinc sulfide
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作者 Cornelia Damm Patrick Armstrong +2 位作者 Christian Roβkopf Stefan Romeis Wolfgang Peukert 《Particuology》 SCIE EI CAS CSCD 2015年第1期1-10,共10页
Molecular dynamics (MD) simulations of the consecutive compression-decompression cycles ot hexagonal zinc sulfide (wurtzite) nanoparticles predict an irreversible phase transformation to the cubic polymorph.The ph... Molecular dynamics (MD) simulations of the consecutive compression-decompression cycles ot hexagonal zinc sulfide (wurtzite) nanoparticles predict an irreversible phase transformation to the cubic polymorph.The phase transformation commences at the contact area between the particle and the inden- ter and proceeds with the number of compression cycles. Dislocations are visible for a particle size above 5nm. Results from wet grinding and dry powder compression experiments on a commercial wurtzite pigment agree qualitatively with MD simulation predictions. X-ray diffraction patterns reveal that the amount of cubic polymorph in the compressed samples increases with pressure applied to the powder. In comparison with powder compression, wet milling leads to a more pronounced phase transformation. This occurs because the particles are exposed to a large number of stress events by collision with the grinding media, which leads to the formation of defects and new surface crystallites by particle fracture. According to the MD simulations, phase transformation is expected to occur preferentially in surface crystallites because they experience the highest mechanical load. Because of the phase transformation, the wet ground and compressed samples exhibit a lower photo- luminescence intensity than the feed material. In comparison with powder compression, milling reduces the photoluminescence intensity more substantially. This occurs because a higher defect concentration is formed. The defects contribute to the phase transformation and photoluminescence quenching. 展开更多
关键词 Polymorph transformationZinc sulfide Molecular dynamics simulation wet milling Powder compression
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