Closure to “Recommendations for Teaching a Successful Design-Based Course: Hydraulic Structure Design” by B. P. Tullis and S. L. Barfuss

2021 ◽  
Vol 147 (3) ◽  
pp. 07021002
Author(s):  
B. P. Tullis ◽  
S. L. Barfuss
Keyword(s):  
Hydraulic Structure ◽  
Structure Design ◽  
Successful Design

Discussion of “Recommendations for Teaching a Successful Design-Based Course: Hydraulic Structure Design” by B. P. Tullis and S. L. Barfuss

2021 ◽  
Vol 147 (3) ◽  
pp. 07021001
Author(s):  
Alessio Radice ◽  
Francesco Ballio ◽  
Laura Longoni ◽  
Scira Menoni ◽  
Daniela Molinari ◽  
...  
Keyword(s):  
Hydraulic Structure ◽  
Structure Design ◽  
Successful Design

Hydraulic Structure Design Concept and Practice - Tacheng Reservoir Project in Xinjiang as an Example

2012 ◽  
Vol 212-213 ◽  
pp. 805-809
Author(s):  
Xiang Hong Huo ◽  
Ying Jie Chen ◽  
Jun Jing Mu ◽  
Shao Jie Li ◽  
Jian Liu ◽  
...  
Keyword(s):  
Hydraulic Structure ◽  
Building Design ◽  
Structure Design ◽  
Hydraulic Structures ◽  
Material Function ◽  
Design Elements ◽  
Mental Functions ◽  
Water Project ◽  
Project Construction ◽  
Reservoir Project

The hydraulic structure visual forms are both a water project construction component, but also the important contents in the design of hydraulic structures. So that at the same time to satisfy the engineering function, given a certain culture connotation and time spirit, become the material function and mental functions complement each other forms. The article integrates design elements according to parts of Xinjiang reservoir project building design, , puts forward the according design thought and method.

scholarly journals Hydraulic structure design and downhole flow field optimization of geophysical drill bits in a limestone stratum

2020 ◽  
Vol 103 (3) ◽  
pp. 003685042093125
Author(s):  
Jing Zhu ◽  
Zhiqiang Huang ◽  
Yachao Ma ◽  
Dou Xie ◽  
Xueying Yang ◽  
...  
Keyword(s):  
Flow Field ◽  
Hydraulic Structure ◽  
Field Tests ◽  
Simulation Method ◽  
Flow Path ◽  
Structure Design ◽  
Drill Bit ◽  
Drilling Performance ◽  
Flow Field Characteristics ◽  
Shaft Lining

The hydraulic structure of conventional geophysical drill bit is designed for the general stratum. When conventional geophysical drill bit pierces into a limestone stratum, the shape of cuttings is large because of the high brittleness of limestone. The cuttings are ground repeatedly; this phenomenon can reduce drilling efficiency and increase drilling costs. According to the characteristics of limestone cuttings, the numerical simulation method is used to research downhole flow field characteristics of conventional geophysical drill bit. First, the influence of key hydraulic structure parameters on cuttings removal performance is found. Then, the hydraulic structure is optimized. The flow field characteristics of the hydraulic structure of the geophysical drill bit before and after optimization in the flow path is analyzed, at the bottom of the bit and the annulus area of the shaft lining. The optimized downhole crossflow area increased from 50% to 98%. No vortex was observed at the exit of the flow path and cuttings groove. The downhole pressure gradient increased from 0.12 Mpa to 0.15 Mpa. The cutting removal space in the annulus area of the shaft lining is fully utilized. Field tests show that the cutting removal and drilling performance of optimized geophysical drill bit has improved and the drilling speed increases by 20.6%.

A tilting high temperature gas reaction chamber for the JEM 7A T.E.M.

1978 ◽  
Vol 36 (1) ◽  
pp. 70-71
Author(s):  
Brian L. Rhoades
Keyword(s):  
Cross Section ◽  
Reaction Chamber ◽  
Objective Lens ◽  
Reduced Cross Section ◽  
Cross Sectional ◽  
Structural Investigations ◽  
Transmission Electron ◽  
Dynamic Experiments ◽  
Successful Design ◽  
Thermocouple Junction

A gas reaction chamber has been designed and constructed for the JEM 7A transmission electron microscope which is based on a notably successful design by Hashimoto et. al. but which provides specimen tilting facilities of ± 15° aboutany axis in the plane of the specimen.It has been difficult to provide tilting facilities on environmental chambers for 100 kV microscopes owing to the fundamental lack of available space within the objective lens and the scope of structural investigations possible during dynamic experiments has been limited with previous specimen chambers not possessing this facility.A cross sectional diagram of the specimen chamber is shown in figure 1. The specimen is placed on a platinum ribbon which is mounted on a mica ring of the type shown in figure 2. The ribbon is heated by direct current, and a thermocouple junction spot welded to the section of the ribbon of reduced cross section enables temperature measurement at the point where localised heating occurs.

A Biological Cryosystem for the Scanning Electron Microscope

1990 ◽  
Vol 48 (1) ◽  
pp. 414-415
Author(s):  
Zhang zhaohua ◽  
Luo Dong ◽  
Guo Yisong
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Natural State ◽  
Specimen Preparation ◽  
Cold Stage ◽  
Specimen Temperature ◽  
Successful Design ◽  
Scanning Electron

Since early 1970's the use of cold stage on SEM for observation of hydrated samples in their natural state has become more and more popular despite its high cost. Experiences gained from earlier experiments indicate that a successful design should incorporate thefollowing features:1. The specimen temperature should be below −135°C (the recrystallization point of water), lower the temperature, better the results.2. The frozen specimen, the cold block in the specimen preparation chamber, as well as the cold stage should be kept under vacuum at all times to keep them frost free.3. Different specimen preparation processes such as fracturing, coating and sublimation should be possible in one compact preparation chamber .

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