نتایج جستجو برای: impingement cooling
تعداد نتایج: 59127 فیلتر نتایج به سال:
Abstract This work reports the results of paired experiments for a complex internal cooling flow within gas turbine vane using magnetic resonance velocimetry (MRV) and steady-state infrared (IR) thermometry. A scaled model leading edge insert with multi-pass impingement was designed, built stereolithography fabrication methods, tested MRV techniques to collect three-dimensional, three-component...
OBJECTIVE To evaluate the clinical application of arthroscopy in the diagnosis and treatment of anterior impingement syndrome of the ankle joint in physical workers. METHODS A retrospective study was carried out at the Department of Orthopedics, the First Hospital affiliated to Nanhua University, Hengyang, China from March 2005 to December 2011. Seventeen cases of anterior impingement syndrom...
Thirty-three patients with impingement syndrome of the rotator cuff were studied before and at operation. It was shown that the rotator cuff lengthens and twists during elevation of the arm. Elevation is achieved by early glenohumeral abduction and continuous flexion and external rotation. The range of free rotation at the glenohumeral joint diminishes progressively during elevation. Rotator cu...
We examined 524 patients with whiplash injuries for delayed onset of shoulder pain in order to establish whether this was due to impingement syndrome. A total of 476 patients (91%) responded to a questionnaire of which 102 (22%) were entered into the study; 43 had both a positive impingement sign and Neer test. The incidence of impingement-type pain was 9%. After treatment 23 patients (5%) had ...
Definition One of the challenges for the diagnosis of subacromial impingement is the multiplicity of conditions with similar symptoms and variable clinical presentation. With no single aetiology, the clinical diagnosis of subacromial impingement has also suffered from a “lack of consensus on diagnostic criteria, case definition and even nomenclature”. For want of clarity, we suggest the followi...
A modular He-cooled divertor concept for DEMO is being investigated at Forschungszentrum Karlsruhe (FZK) within the framework of the EU power plant conceptual study. The design goal is to reach a heat flux of at least 10 MW/m. The reference design HEMJ (helium-cooled modular divertor with jet cooling) consists of a hexagonal tungsten tile which is brazed to a thimble made of W-1%La2O3. The cool...
OBJECTIVES To analyse the risk of shoulder impingement syndrome relative to shoulder intensive work. METHODS A cross sectional study of a historical cohort of 1591 workers employed between 1986 and 1993 at a slaughterhouse or a chemical factory. Workers not doing tasks in slaughtering or meat processing constituted the reference group. Intensity of shoulder work in meat processing tasks was a...
BACKGROUND Femoroacetabular impingement (FAI) is increasingly recognized as a potential cause of hip osteoarthritis. A system capable of pre-operatively simulating hip range of motion (ROM) by given surface models from either healthy or FAI diseased bone is desirable. METHODS An impingement detection system using bounding sphere hierarchies was first developed. Both precision and accuracy of ...
Computer modeling of 10 patients' computed tomographic scans was used to study the variables affecting hip arthroplasty range of motion before bony impingement (ROMBI) including acetabular offset and height, femoral offset, height and anteversion, and osteophyte removal. The ROMBI was compared with the ROM before component impingement and the native hip ROM. The ROMBI decreased with decreased t...
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