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透平叶轮内湿蒸汽凝结水滴流动的三维数值模拟
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作者 饶杰 王枭 +2 位作者 肖军 于跃平 陈启明 《风机技术》 2023年第S01期1-3,7,共4页
以水蒸汽为介质的透平膨胀机,其内部流场可能会出现湿蒸汽凝结现象,形成的水滴将进一步导致叶片损伤和机组效率降低。因此,研究透平叶轮内湿蒸汽凝结水滴的流动,对于评估叶片侵蚀损伤和气动设计,具有重要意义。本文在Euler-Lagrange两... 以水蒸汽为介质的透平膨胀机,其内部流场可能会出现湿蒸汽凝结现象,形成的水滴将进一步导致叶片损伤和机组效率降低。因此,研究透平叶轮内湿蒸汽凝结水滴的流动,对于评估叶片侵蚀损伤和气动设计,具有重要意义。本文在Euler-Lagrange两相流动模型的基础上,开发水滴示踪程序,用以捕捉三维流场中凝结水滴的运动轨迹。计算结果表明,该程序能较好地追踪水滴的运动及碰撞信息。 展开更多
关键词 湿蒸汽 透平叶轮 两相流 水滴
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围带对透平膨胀机叶轮气动性能的影响研究
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作者 常超 王枭 +3 位作者 饶杰 陈启明 胡四兵 王弼 《风机技术》 2023年第S01期27-30,共4页
应用CFD方法对透平膨胀机叶轮流场进行计算。首先将计算结果与实验数据进行对比,验证了计算方法的准确性和可靠性。然后对比分析不同围带参数对叶轮气动性能的影响,包括围带宽度、倒角以及叶顶间隙。结果表明,适当宽度的围带有利于提高... 应用CFD方法对透平膨胀机叶轮流场进行计算。首先将计算结果与实验数据进行对比,验证了计算方法的准确性和可靠性。然后对比分析不同围带参数对叶轮气动性能的影响,包括围带宽度、倒角以及叶顶间隙。结果表明,适当宽度的围带有利于提高叶轮气动性能;围带出口内缘倒角有助于提高叶轮气动性能,外缘倒角则会产生不利影响;叶顶间隙会导致叶轮气动性能降低,且随着间隙增大,不利影响更加显著。 展开更多
关键词 透平膨胀机 叶轮 围带 气动性能
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动压径向滑动轴承油膜特性的数值计算
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作者 田奇勇 黄文俊 +2 位作者 饶杰 朱晓农 王贤震 《风机技术》 2018年第1期44-47,共4页
传统轴承参数计算方法是利用已有的宽径比下轴承静动态参数的图表,假定轴承工作平均温度,按所选润滑油确定油的粘度和已知的轴承尺寸和运转参数,计算出轴承承载量系数F_m,再由F_m和轴承宽径比按已知的图表插值求得轴承工作状态下的各参... 传统轴承参数计算方法是利用已有的宽径比下轴承静动态参数的图表,假定轴承工作平均温度,按所选润滑油确定油的粘度和已知的轴承尺寸和运转参数,计算出轴承承载量系数F_m,再由F_m和轴承宽径比按已知的图表插值求得轴承工作状态下的各参数值,这种计算方法不方便且有较大误差。本文基于有限差分法,采用MATLAB编程计算,对已知外载荷和宽径比的实际轴承直接求解完整二维流动Reynolds方程,得到油膜厚度和油膜压力分布。以某动压径向轴承为例,采用本文方法计算实际轴承参数,取得较好的计算精度。该方法有助于提高动压滑动轴承的设计质量,为轴承故障诊断提供了一种可行的途径。 展开更多
关键词 径向滑动轴承 油膜压力 有限差分法 数值计算
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重水辅助下游离内界膜填塞术治疗黄斑裂孔合并视网膜脱离的疗效分析 被引量:7
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作者 程艺 梅锋 +6 位作者 胡裕翔 许晓璇 晏立 吴娜 吴雅俊 饶杰 吴晓蓉 《中国现代医学杂志》 CAS 2020年第4期88-92,共5页
目的观察重水辅助下游离内界膜填塞术治疗黄斑裂孔(MH)合并视网膜脱离(RD)的疗效,并与单纯内界膜剥离术相比较,分析2种术式的安全性及有效性。方法回顾性分析2015年1月—2016年12月南昌大学第一附属医院收治的42例MH合并RD患者的临床资... 目的观察重水辅助下游离内界膜填塞术治疗黄斑裂孔(MH)合并视网膜脱离(RD)的疗效,并与单纯内界膜剥离术相比较,分析2种术式的安全性及有效性。方法回顾性分析2015年1月—2016年12月南昌大学第一附属医院收治的42例MH合并RD患者的临床资料,所有患者行25G plus玻璃体切除术。其中,23例联合行重水辅助下游离内界膜填塞术(填塞组),19例联合行单纯内界膜剥离术(未填塞组)。两组术中均填充硅油,术后均行俯卧位治疗,随访时间分别为3和6个月。对比两组患者术后最佳矫正视力、眼底照相、光学相干断层扫描(黄斑区)、光学相干断层扫描血管成像(黄斑区)、MH闭合、视网膜复位及RD复发情况。结果两组最佳矫正视力较术前提高(P>0.05)。术后3个月填塞组与未填塞组MH闭合率分别为95.7%和63.2%(P<0.05)。两组术后6个月MH闭合率比较,差异有统计学意义(P<0.05)。两组术后3和6个月视网膜复位率比较,差异无统计学意义(P>0.05)。结论重水辅助下游离内界膜填塞术治疗MH合并RD较单纯内界膜剥离术更加安全有效,可促进黄斑区及脱离视网膜的解剖复位与视功能恢复。 展开更多
关键词 视网膜脱离 黄斑裂孔/视网膜穿孔 内界膜填塞/内填塞 重水/氧化氘 治疗效果
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甲状腺相关性眼病炎性因素的研究进展 被引量:9
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作者 程艺 晏立 +6 位作者 饶杰 吴雅俊 吴娜 黄慧 李思瑜 施凌 吴晓蓉 《国际眼科杂志》 CAS 北大核心 2020年第7期1164-1166,共3页
甲状腺相关性眼病(thyroid-associated ophthalmopathy,TAO)是成人眼眶病中最常见的疾病,其眼部损害日益严重,对患者身心健康造成极大的伤害。TAO的发病机制十分复杂,目前还未完全阐明,经典理论为共抗原学说。鉴于现有治疗方案存在的弊... 甲状腺相关性眼病(thyroid-associated ophthalmopathy,TAO)是成人眼眶病中最常见的疾病,其眼部损害日益严重,对患者身心健康造成极大的伤害。TAO的发病机制十分复杂,目前还未完全阐明,经典理论为共抗原学说。鉴于现有治疗方案存在的弊端,研究与TAO相关的因素进而探求更好的治疗方法对TAO患者具有重要意义。近年来研究发现炎症反应与TAO关系密切,故本文就TAO相关炎性因素的研究做一综述。 展开更多
关键词 甲状腺相关性眼病 炎性因子 炎症细胞
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Vitrectomy with internal limiting membrane peeling versus its flap insertion for macular hole in high myopia: a Meta-analysis 被引量:3
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作者 Ya-Jun Wu jie rao +7 位作者 Kang-Rui Wu Na Wu Yi Cheng Xiao-Xuan Xu Li Yan Yi Shao Yu Tian Xiao-Rong Wu 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2020年第1期141-148,共8页
AIM: To compare the anatomic and functional outcomes between vitrectomy with internal limiting membrane(ILM) peeling and internal ILM flap insertion technique for high myopia macular hole(MH).METHODS: Pub Med, Cochran... AIM: To compare the anatomic and functional outcomes between vitrectomy with internal limiting membrane(ILM) peeling and internal ILM flap insertion technique for high myopia macular hole(MH).METHODS: Pub Med, Cochrane Library, EMBASE, and CNKI were systematically searched, and all studies involved MH were included. The closure rate of MH and the postoperative best-corrected visual acuity(BCVA) at 6 mo after the initial surgery were the primary measures. All statistical tests were performed in Review Manager 5.3.RESULTS: Five studies that included 151 eyes of 151 patients were finally included, all of which were retrospectively comparative studies. Between the pars plana vitrectomy(PPV) with ILM peeling surgery and the ILM insertion technique, the latter had significantly better efficacy with respect to the closure rate of MH(OR=21.32, 95%CI=7.25-62.67, P<0.001);However, regarding BCVA at 6 mo after the initial surgery in MH, there was no statistical significance between the groups(OR=-0.04, 95%CI=-0.22-0.14, P=0.66). In addition, regarding the rate of retinal reattachment after the initial surgery, the two different methods were not significantly different(OR=2.22, 95%CI=0.34-14.32, P=0.4).CONCLUSION: Both ILM peeling and ILM insertion technique could significantly improve anatomic outcomes of MH in high myopia with or without retinal detachment(RD), and anatomic outcomes are more effective. However, there is no statistical significance in BCVA at 6 mo after the initial surgery in MH, or in the rate of retinal reattachment after the first surgery, between the two methods. 展开更多
关键词 macular hole high myopia best-corrected visual acuity retinal attachment META-ANALYSIS
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Gurney襟翼在离心压缩机叶轮上的数值研究 被引量:2
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作者 王枭 饶杰 +2 位作者 李镇杉 朱晓农 常超 《风机技术》 2019年第1期37-40,I0008,共5页
在离心压缩机叶轮上增设Gurney襟翼,采用CFD方法对叶轮进行气动计算,对比分析不同襟翼高度对叶轮流场的影响。结果表明,在叶片压力面增设Gurney襟翼,可以提高叶轮压比,襟翼高度在一定范围内可以提高叶轮效率。同时,Gurney襟翼也会对叶... 在离心压缩机叶轮上增设Gurney襟翼,采用CFD方法对叶轮进行气动计算,对比分析不同襟翼高度对叶轮流场的影响。结果表明,在叶片压力面增设Gurney襟翼,可以提高叶轮压比,襟翼高度在一定范围内可以提高叶轮效率。同时,Gurney襟翼也会对叶轮流场压力分布和相对马赫数分布产生一定的影响。 展开更多
关键词 离心压缩机 叶轮 GURNEY襟翼 襟翼高度 流场 相对马赫数
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Assessing anxiety,depression,and stress among inpatients with cancer 被引量:2
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作者 Honghong Xu Ruotong Xue +9 位作者 Yi Cheng Yujie Zhang jie rao Mei Liu Shiying Yu Lingxiang Liu Yiqian Liu Yongqian Shu Liuqing Yang Hanping Shi 《Oncology and Translational Medicine》 2020年第3期126-130,共5页
Objective This study aimed to assess anxiety,depression,and stress among inpatients with cancer.Methods Two hundred thirty-five hospitalized patients with cancer were surveyed with the Depression Anxiety Stress Scales... Objective This study aimed to assess anxiety,depression,and stress among inpatients with cancer.Methods Two hundred thirty-five hospitalized patients with cancer were surveyed with the Depression Anxiety Stress Scales(simplified Chinese Version).The software program SPSS 25.0 was used for statistical analysis of the survey data.Results The average scores of depression,anxiety,and stress of inpatients with cancer were 12.17,11.84,and 13.98 respectively,which were higher than the normal range.The scores of anxiety and stress of inpatients with different caregivers were statistically different(P=0.024/0.036).The anxiety and stress scores of inpatients with spouses as caregivers were higher than those of inpatients with children as caregivers.There was a statistically significant difference in the incidence of stress between inpatients with cancer with religious beliefs and inpatients with cancer without religious beliefs(P=0.026),and those with religious beliefs had greater incidence of stress.The score of anxiety was significantly higher for inpatients with children than for inpatients without children(P=0.040).Conclusion The anxiety,depression,and stress levels of inpatients with cancer are relatively high.It is necessary to pay special attention to the psychological status of these patients during clinical diagnosis and treatment to improve their quality of life. 展开更多
关键词 inpatients with cancer ANXIETY DEPRESSION STRESS
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几何参数对跨临界二氧化碳离心压缩机叶轮冷凝现象的影响研究 被引量:3
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作者 王枭 饶杰 +2 位作者 朱晓农 常超 王弼 《风机技术》 2020年第6期18-22,共5页
采用CFD方法对跨临界二氧化碳离心压缩机叶轮流场进行计算。对比分析不同几何参数对叶轮内冷凝现象的影响,其中参数包括叶片进口角、前(后)掠角、轮毂进口半径以及叶片包角。计算表明,叶片进口角、前(后)掠角和轮毂入口半径对冷凝区域... 采用CFD方法对跨临界二氧化碳离心压缩机叶轮流场进行计算。对比分析不同几何参数对叶轮内冷凝现象的影响,其中参数包括叶片进口角、前(后)掠角、轮毂进口半径以及叶片包角。计算表明,叶片进口角、前(后)掠角和轮毂入口半径对冷凝区域的范围和冷凝程度,均有显著影响,适当选取参数可有效改善冷凝现象,而叶片包角则影响相对较小。研究结果可以为跨临界二氧化碳离心压缩机叶轮优化设计以及冷凝现象研究,提供参考和依据。 展开更多
关键词 跨临界二氧化碳 离心压缩机叶轮 流场 冷凝 几何参数
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气垫船用垫升风机叶片轻量化研究 被引量:1
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作者 常超 于跃平 +3 位作者 陈启明 饶杰 王枭 王弼 《风机技术》 2020年第2期73-78,共6页
垫升风机作为海陆两栖作战艇只--气垫船的核心动力装备,其轻量化和可靠性是两个重要设计指标。轴流式垫升风机叶片质量仅为常规设计的1/4,且可靠性要求高,因此,叶片轻量化是轴流式垫升风机设计难点之一。目前,有关轴流式垫升风机叶片轻... 垫升风机作为海陆两栖作战艇只--气垫船的核心动力装备,其轻量化和可靠性是两个重要设计指标。轴流式垫升风机叶片质量仅为常规设计的1/4,且可靠性要求高,因此,叶片轻量化是轴流式垫升风机设计难点之一。目前,有关轴流式垫升风机叶片轻量化研究未见相关公开文献报道。本文根据某型号气垫船用垫升风机的设计要求,针对叶片轻量化,选材、强度计算、成型方法等方面进行了研究。研究表明:采用铝合金或碳纤维复合材料的叶片可以达到轻量化的要求,碳纤维复合材料叶片的安全性高于铝合金叶片且通过频率隔离裕度宽,采用一定方式铺层的碳纤维可达到固有频率高且强度好的效果。 展开更多
关键词 垫升风机 叶片 轻量化 铝合金 碳纤维
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Mental health status of cancer caregivers,assessment tools,and psychological interventions 被引量:1
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作者 Honghong Xu Ruotong Xue +9 位作者 Yi Cheng Yujie Zhang jie rao Mei Liu Shiying Yu Lingxiang Liu Yiqian Liu Yongqian Shu Liuqing Yang Hanping Shi 《Oncology and Translational Medicine》 2020年第4期170-178,共9页
Many studies pointed out that psychological pain is not limited to the cancer patients themselves,but their caregivers also experience different levels of psychological problems such as depression,anxiety,and stress.T... Many studies pointed out that psychological pain is not limited to the cancer patients themselves,but their caregivers also experience different levels of psychological problems such as depression,anxiety,and stress.This article attempts to review the mental health status,assessment tools,and psychological interventions of the caregivers of cancer patients,and calls on social and medical workers to pay attention to the mental and physical health status of the caregivers of cancer patients. 展开更多
关键词 cancer patient caregivers mental symptoms evaluation tools psychological intervention
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叶片数与分流叶片长度对小型压缩机性能影响研究 被引量:1
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作者 王弼 饶杰 +5 位作者 常超 陈启明 胡四兵 黄文俊 王枭 孙丽娟 《风机技术》 2021年第S01期26-31,共6页
以一种小型压缩机的叶轮为研究对象,运用数值模拟的方法研究叶片数和分流叶片长度对叶轮性能的影响。研究发现:叶片数较少,会增大叶片的当量脚,使得叶片边界层增厚,叶轮效率下降;叶片数过多,叶片在做功过程中会使得气体的摩擦损失和叶... 以一种小型压缩机的叶轮为研究对象,运用数值模拟的方法研究叶片数和分流叶片长度对叶轮性能的影响。研究发现:叶片数较少,会增大叶片的当量脚,使得叶片边界层增厚,叶轮效率下降;叶片数过多,叶片在做功过程中会使得气体的摩擦损失和叶片阻塞增加,因此存在一个最佳叶片数,以该叶轮而言,最佳稠密度为1.9,叶片数为18时,叶轮的性能最好;分流叶片的长度对叶轮性能也有一定的影响,当短叶片与长叶片垂直长度比为0.7时,叶轮性能较好。 展开更多
关键词 叶片数 分流叶片 稠密度 叶轮性能
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Investigation of Anxiety, Depression, Stress and Related Factors in the Primary Caregivers of Inpatients with Cancer 被引量:2
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作者 Hong Hong Xu Ruo Tong Xue +9 位作者 Yi Cheng Yu jie Zhang jie rao Mei Liu Shi Ying Yu Ling Xiang Liu Yi Qian Liu Yong Qian Shu Liu Qing Yang Han Ping Shi 《Journal of Nutritional Oncology》 2020年第4期176-181,共6页
Objectives To explore the anxiety,depression,stress and related factors in the primary caregivers of inpatients with cancer.Methods A total of 235 selected caregivers of inpatients with cancer were included as the res... Objectives To explore the anxiety,depression,stress and related factors in the primary caregivers of inpatients with cancer.Methods A total of 235 selected caregivers of inpatients with cancer were included as the research subjects,and the Depression-Anxiety-Stress Self-Rating Scale 21(DASS-21)was used to evaluate their depression,anxiety and stress.The data were statistically analyzed using SPSS 25.0 software.Results The study showed that the caregivers of cancer patients had different levels of depression,anxiety and stress,but all rates were above the normal range,with 51.7%,56.0%and 34.9%of subjects respectively reporting these conditions.In addition,the above indicators were correlated with the caregivers’gender,age,relationship with the cancer patients,the family’s economic status,religious belief and duration of caregiving:being female(T-Statistic=-2.061,P=0.040)and having a low income(F=2.627,P=0.035)were positively correlated with the caregivers’stress level.Having a low income(F=2.804,P=0.027)was also positively correlated with the depression scores.When the caregivers were the patient's parents,they had higher levels of anxiety(F=2.429,P=0.036)than caregivers in other relationships.The results of a linear correlation analysis showed that the depression of caregivers was negatively correlated with the family’s economic status(r value=-0.244,P<0.01)and positively correlated with the duration of caregiving(r=0.138,P<0.05).The anxiety score was positively correlated with the caregivers’age(r=0.141,P<0.05)and duration of caregiving(R=0.132,P<0.05),but negatively correlated with the family’s economic status(r=-0.187,P<0.01).The stress level was positively correlated with the caregivers’gender(r=0.137,P<0.05),age(r=0.210,P<0.01),duration of caregiving(r=0.171,P<0.01)and current job status(r=0.165,P<0.05),but negatively correlated with the family’s economic status(r=-0.202,P<0.01).The results of a multiple stepwise regression showed that age and religious belief were significant predictors of stress,while the family’s economic status was a significant predictor of depression,and age was a significant predictor of anxiety.Conclusion The caregivers of hospitalized cancer patients showed varying degrees of anxiety,depression and stress,according the psychological assessments;the provision or interventions might be helpful for these individuals. 展开更多
关键词 CAREGIVER ANXIETY DEPRESSION STRESS
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Mental distress evaluation and intervention for cancer patients
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作者 Honghong Xu Ruotong Xue +9 位作者 Yi Cheng Yujie Zhang jie rao Mei Liu Shiying Yu Lingxiang Liu Yiqian Liu Yongqian Shu Liuqing Yang Hanping Shi 《Oncology and Translational Medicine》 2019年第6期301-306,共6页
Mental distress is prevalent among cancer patients.Many measurements have been developed to screen and evaluate such distress.About one-third of the persons with cancer will experience significant levels of distress,r... Mental distress is prevalent among cancer patients.Many measurements have been developed to screen and evaluate such distress.About one-third of the persons with cancer will experience significant levels of distress,requiring targeted psychosocial intervention.Mental distress has been endorsed as the sixth vital sign by the International Psycho-Oncology Society(IPOS) in 2009.The need for effective screening and psychological interventions is well recognized as a necessary,integral part of oncology care.This systematic review examines the psychometric properties of the existing tools used to screen patients for emotional distress and the applicable intervention methods. 展开更多
关键词 cancer patients mental distress EVALUATION INTERVENTION
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Silicone oil migrating into the conjunctival space and orbit after surgery for an eye-penetrating injury:A case report
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作者 Ben-Liang Shu Hong-Yun Wu +4 位作者 Yu-Xiang Hu jie rao Bin Wei Qin-Yi Huang Xiao-Rong Wu 《World Journal of Clinical Cases》 SCIE 2024年第19期3950-3955,共6页
BACKGROUND We report a case of eye-penetrating injury in which a massive silicone oil migration into the patient’s subconjunctival space and orbit occurred after vitrectomy.CASE SUMMARY A 30-year-old male patient sou... BACKGROUND We report a case of eye-penetrating injury in which a massive silicone oil migration into the patient’s subconjunctival space and orbit occurred after vitrectomy.CASE SUMMARY A 30-year-old male patient sought medical attention at Ganzhou People’s Hospital after experiencing pain and vision loss in his left eye due to a nail wound on December 9,2023.Diagnosis of penetrating injury caused by magnetic foreign body retention in the left eye and hospitalization for treatment.On December 9,2023,pars plana vitrectomy was performed on the left eye for intraocular foreign body removal,abnormal crystal extraction,retinal photocoagulation.Owing to the discovery of retinal detachment at the posterior pole during surgery,silicone oil was injected to fill the vitreous body,following which upper conjunctival bubble-like swelling was observed.Postoperative orbital computed tomography(CT)review indicated migration of silicone oil to the subconjunctival space and orbit through a self-permeable outlet.On December 18,2023,the patient sought treatment at the First Affiliated Hospital of Nanchang University,China.The patient presented with a pronounced foreign body sensation following left eye surgery.On December 20,2023,the foreign body was removed from the left eye frame and an intraocular examination was conducted.The posterior scleral tear had closed,leading to termination of the surgical procedure following supplementary laser treatment around the tear.The patient reported a significant reduction in ocular surface symptoms just one day after surgery.Furthermore,a notable decrease in the migration of silicone oil was observed in orbital CT scans.CONCLUSION The timing of silicone oil injection for an eye-penetrating injury should be carefully evaluated to avoid the possibility of silicone oil migration. 展开更多
关键词 Silicone oils Migration Vitrectomy Eye injuries Penetrating Case report
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