Academic literature on the topic 'Zone of clearance'

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Journal articles on the topic "Zone of clearance"

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Dusser, D. J., B. D. Minty, M. A. Collignon, D. Hinge, L. G. Barritault, and G. J. Huchon. "Regional respiratory clearance of aerosolized 99mTc-DTPA: posture and smoking effects." Journal of Applied Physiology 60, no. 6 (1986): 2000–2006. http://dx.doi.org/10.1152/jappl.1986.60.6.2000.

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We studied 10 healthy nonsmokers and 8 healthy smokers, in both the upright and supine position, to investigate whether regional differences in respiratory clearance of technetium-99m-labeled diethylenetriamine pentaacetic acid 99mTc-DTPA (RC-DTPA) existed and to assess the influence of posture and smoking on the regional RC-DTPA. RC-DTPA was assessed by the lung clearance rates (%/min) of aerosolized 99mTc-DTPA (0.8 micron MMD; 2.4 GSD), using data corrected for recirculating radioactivity, in the upper (zone 1), middle (zone 2), and lower (zone 3) posterior lung fields. In nonsmokers, RC-DTP
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Morrison, G. L., R. E. DeOtte, and H. D. Thames. "Turbulence Measurements of High Shear Flow Fields in a Turbomachine Seal Configuration." Journal of Tribology 115, no. 4 (1993): 670–77. http://dx.doi.org/10.1115/1.2921692.

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The mean velocity and Reynolds stress tensor throughout a whirling annular seal are presented. The data were collected with a three-dimensional laser Doppler velocimeter using phase averaging. Two axial flow conditions (Re = 12,000 and 24,000) were studied at one shaft speed (Ta = 6,600). The eccentricity and whirl ratios were 50 percent and 100 percent, respectively. There is a region of high axial momentum at the inlet on the pressure side of the clearance that migrates around the seal to the suction side at the exit. The normalized axial momentum in this region is higher in the low Reynolds
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El-Thalji, I., and Y. Khattab. "Internal clearance behaviour in healthy and faulty bearings." IOP Conference Series: Materials Science and Engineering 1294, no. 1 (2023): 012041. http://dx.doi.org/10.1088/1757-899x/1294/1/012041.

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Abstract Internal clearance is a critical parameter in bearing design and operation because it affects the bearing’s performance. It can be considered as a special type of the looseness fault. Several studies indicate that rolling bearings with large internal clearances showed a short predicted fatigue life. However, the time waveform and spectral features of bearing with internal clearances are partially studied and require further studies. To address this gap, the purpose of this paper is to study the effect of internal clearance on the dynamic response of healthy and faculty rolling bearing
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Fan, W. F., J. H. Li, and F. Li. "The Optimized Negative Clearance Value with Reason in ASTM-Gr.D Fine-Blanking with Negative Clearance Blanking." Advanced Materials Research 588-589 (November 2012): 80–83. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.80.

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This paper has established geometry model of the rigid-plastic Finite Element Model (FEM) basing on the foundation of similarity theory. It has simulated and analyzed the material of ASTM-Gr.D used by finite element analysis software of metal plastic DEFORM with different negative clearance values blanking, which obtains the caver of the different negative clearance values with roll-over with sheared zone with punching load. According to the result of simulation, it has made an experiment on the ASTM-Gr.D of 2.0(mm) thickness with the different negative clearance, and obtained samples with she
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Du, Hong, Wei Fu Fan, and Zhong Mei Zhang. "Comparative Study of the Process Fracture between Fine-Blanking with Negative Clearance and Conventional Blanking." Advanced Materials Research 97-101 (March 2010): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.191.

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The different separation mechanism of fine-blanking with negative clearance and conventional blanking under different blanking process are analyzed through fine-blanking with negative clearance and conventional blanking processing experiments on AISI-1045 steel. The fractography photographs in the different deformation regions, such as rollover zone, shearing band, fracture zone and burr zone are scanned by scanning electron microscope (SEM-JSM-6360LV). The place of fracture of fine-blanking with negative clearance has emerged into the middle of work piece not the undermost of workpiece, and t
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Chen, Shaowen, Qinghe Meng, Weihang Li, Zhihua Zhou, and Songtao Wang. "Experimental study on axially non-uniform clearances in a linear turbine cascade with a cavity squealer tip." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 5 (2018): 1645–55. http://dx.doi.org/10.1177/0954410018759837.

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The effects of axially non-uniform clearances on the tip leakage flow and aerodynamic performance in a linear turbine cascade with a cavity squealer tip were investigated in this study with the objective of improving the flow loss and tip flow field structure. A calibrated five-hole probe was used for the measurement of three-dimensional flows downstream of the cascade. The method of oil-flow visualization was used to show the endwall flow field structure. The distribution of endwall static pressure was measured particularly by using the special moveable endwall. The axially non-uniform cleara
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TOH, Michiharu. "Roles of Tip-Clearance Zone in Internal Mixers." NIPPON GOMU KYOKAISHI 84, no. 11 (2011): 342–49. http://dx.doi.org/10.2324/gomu.84.342.

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Xie, Hai He, Huang Ping Yan, and Yuan Qing Huang. "Spatial Filtering Effect of Tip Clearance Using Capacitance Displacement Sensor." Advanced Materials Research 658 (January 2013): 420–24. http://dx.doi.org/10.4028/www.scientific.net/amr.658.420.

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According to structural characteristics and measurement needs of tip clearance of turbine engine and other rotating blade device, a leaves lattice model with vector characteristics is established. Based on measurement principle of the capacitive displacement sensor, the tip clearance measurement model is established. The spatial filtering effect and the impact of the tip clearance measurement results caused by blade thickness, sensing zone size, blade rotation speed and signal sampling rate is analyzed. The research results show that there is a minimum requirement about sensing zone size, blad
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Narayanan, Advaith, Rhys Northcote, Patrick Cleary, Miguel Quinones, and Cliff Butcher. "Sheared edge formability of multi-phase steels under in- and out-of-plane deformation." MATEC Web of Conferences 408 (2025): 01066. https://doi.org/10.1051/matecconf/202540801066.

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Multi-phase advanced high strength steels can exhibit significant sheared edge sensitivity due to their microstructures and alloying elements. Processing defects such as centerline segregation of martensite or Ti-based inclusions can affect edge formability depending upon the applied deformation such as in-plane stretching versus out-of-plane hole extrusion. This study investigates the influence of punching clearance and deformation mode on the sheared edge formability of two hot-rolled MP800 steels, MP800-V1 and MP800-V2, which differ in local ductility and severity of centerline segregation.
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Hooke, C. J. "A Note on the Elastohydrodynamic Lubrication of Soft Contacts." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 200, no. 3 (1986): 189–94. http://dx.doi.org/10.1243/pime_proc_1986_200_114_02.

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The clearances in highly loaded non-Hertzian contacts can be calculated directly from the dry contact pressure distribution. This note presents a method of extending the analysis into less highly loaded regions. It is shown that the method accurately predicts the clearance over much of the transition zone for Hertzian contacts and its use in a non-Hertzian situation is illustrated using the contact between a rigid cylinder and an elastomer-lined surface as an example.
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Dissertations / Theses on the topic "Zone of clearance"

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Lin, Hsiao-Ting, and 林曉亭. "Strategic Analysis of Customs Clearance Facilitation :An Example of Taoyuan Air Cargo Park Free Trade Zone." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/93664842693410826007.

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碩士<br>華梵大學<br>工業工程與經營資訊學系碩士班<br>96<br>R.O.C. Government started a project of developing Taiwan as “Regional Operational Center”for Asia Pacific in January 1995, started a project of developing Taiwan as “Global Logistics Center” in 2002, started a plan of “Important Development Projects including Corporate Headquarters Establishments to challenge in 2008”in July 2002, and started a plan of establishing “Free Trade Ports Zone” in January 2005. All of the above projects and plans aim at developing Taiwan as a global logistics and management hub.to approach strategic planning.This research aims a
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Books on the topic "Zone of clearance"

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Drake, Paul J. Dimensioning and Tolerancing Handbook. McGraw-Hill Professional, 1999.

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Book chapters on the topic "Zone of clearance"

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Rowbotham, Mark. "Customs clearance." In Freeports and Free Zones. Informa Law from Routledge, 2022. http://dx.doi.org/10.4324/9781003232025-7.

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Hien, Bui Thi Dieu, Mai Thi Xuan Ngan, and Tran Minh Hoan. "Assess the Current Situation of Land Clearance for Cemetery Land and Graveyards in Nhon Hoi Economic Zone, Binh Dinh Province." In Springer Geography. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-84308-2_9.

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Hai, Dapeng, Liangwen Wei, Guoqi Su, et al. "The Close Proximity Impact of a Newly Constructed Large Cross-Section Twin-Arch Tunnel Crossing an Existing Tunnel." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-2417-8_15.

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AbstractWith the Xinsen Avenue Tunnel Project in Chongqing Gaoxin District as the research context, this study investigates the degree of impact on an existing tunnel resulting from the construction of a new twin-arch tunnel that crosses over it. Utilizing finite element analysis methods, the study explores the displacement and stress variation patterns in the existing tunnel following the construction of the new tunnel, considering different clearances, crossing angles, and rock mass grade factors. Additionally, based on a composite discernment criterion involving additional stress and additi
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He, Xiaojun. "Study on the Stability of Rock Walls in Shallow-Buried Tunnels with Small Clearances in Layered Rock Masses." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-5814-2_16.

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AbstractIn the engineering of tunnels with small clearances, the structural features of rock layers play a crucial role in the stability of the central rock walls. This study employed the Discrete Element Method software (UDEC) to simulate the mechanical response of tunnels with small clearances under various rock layer dip angles, both in unfortified conditions and when reinforced with shotcrete. The research thoroughly examined the deformation patterns of the central rock walls, the development process of the plastic zones, and the dynamic changes in the stress distribution along the rock la
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Ouyang Bing, Lu Jiabin, Yan Qiusheng, Kuang Zhihui, Zeng Jun, and Li Hui. "Research on the Effect of Shear Clearance on the Processing of Copper Sheet." In Advances in Transdisciplinary Engineering. IOS Press, 2017. https://doi.org/10.3233/978-1-61499-792-4-33.

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In shearing processing experiments of copper sheet of 0.5mm thick, The effects of shear clearance on shearing surface morphology, edge hardening and shearing force are studied. The results show that the shear clearance directly affects the shearing surface morphology and the degree of work hardening. With the increase of the shear clearance, the height of shearing zone decreases gradually, but the height of the fracture zone, rollover and burr increase gradually. The degree and area of work hardening increase initially and then decrease, when the relative clearance (c/t) is 8%, the hardness va
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Li, Chen, and Hongming Wang. "Influence of Axial Clearance on Water-Jet Axial Flow Pump." In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210331.

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Three dimensional Reynolds averaged N-S equation and S-A turbulent model were adopted to simulate the flow field and hydraulic performance of the waterjet axial flow pump with the different impeller axial clearance. The numerical research results show that with the increase of axial clearance size, total pressure and static pressure rise at first and then decreases, torque and shaft power remain basically unchanged, the efficiency decreases gradually, the suction surface separation zone of stator expanded under the design condition. When the axial clearance is 30mm, the pump hydraulic performa
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Zhu Yiwei, Lu Jiabin, Yan Qiusheng, Zeng Jun, Ouyang Bing, and Kuang Zhihui. "Effect of Plate Thickness on Shear Fracture Surface Features of Electrical Steel Sheet." In Advances in Transdisciplinary Engineering. IOS Press, 2017. https://doi.org/10.3233/978-1-61499-792-4-90.

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The shear test of 0.20&amp;ndash;0.65 mm electrical steel sheet was carried out at the same relative lateral clearance and shear rate, The morphology of the specimen after shearing was detected by SEM and white light interferometer (2D/3D). The results show: Under the same relative backlash, the thinner thickness of the plate, the greater relative height of rollover, the narrower relative height of shear zone, the wider relative height of fracture zone, and the greater fracture angle, the more rough the fracture surface, the more obvious the dimples feature.
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Tsabazis, Nikolaos, Anastasia Vatopoulou, and Angelos Daniilidis. "Non-Free Surgical Margins After LLETZ-LEEP." In Handbook of Research on Oncological and Endoscopical Dilemmas in Modern Gynecological Clinical Practice. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4213-2.ch010.

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Large Loop Excision of the Transformation Zone (LLETZ) is thought to be the treatment of choice for the high-grade precancerous lesions. The cone is also the “gold standard” specimen for the diagnosis of the underlying cervical disease once it includes the entire area of carcinogenesis for the squamous epithelium (transformation zone). In most research studies, therapeutic success after conization is a term generally assigned for disease clearance, that is, absence of residual high grade/CIN2+ histology by the end of a reasonable follow-up period, aiming at risk reduction for future recurrence
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Mishra, Minakshi, and Lovely Sabat. "ENVIRONMENT IMPACT ASSESSMENT FOR THE PROPOSED SPECIAL ECONOMIC ZONE OFAN URBAN AREA." In Futuristic Trends in Construction Materials & Civil Engineering Volume 3 Book 2. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bice2p1ch2.

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A nation's socioeconomic progress is influenced by the development of its infrastructure. But as industrialization accelerates, its effects on the environment are overlooked, which leads to air, water, and land pollution. Ecological imbalance has a number of detrimental effects on living things, including global warming, health issues, disturbed animals, and natural disasters. Large scale developments, such as setting up of special economic zone (SEZ) requires a lot of environmental monitoring, clearance and management. Clustering of different industries, such as chemical, textile, leather, et
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Juris, Stephen. "B-Cell-Mediated Adaptive Immunity." In Immunology. Oxford University Press, 2022. http://dx.doi.org/10.1093/hesc/9780190200312.003.0010.

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This chapter explores the function of B cells in the adaptive immune system. It analyses the molecular mechanisms that drive clonal selection and expansion of B cells to understand the means by which immunoglobulins act in a humoral immune response. It also notes how B cells can only become activated upon engagement of their cell-surface immunoglobulin with the antigen they are capable of recognizing. The chapter talks about the migration of B cells into secondary lymphoid tissues to monitor the presence of antigens, which is where they test for the presence of the antigen their immunoglobulin
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Conference papers on the topic "Zone of clearance"

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Zhuang, Hongshan, Xiang Yin, Xiaojun Zhang, Chuanjiang Tang, Shaoshan Wu, and Hui Shi. "Transmission tower height control in airport clearance safety protection zone based on multiview image shadow altimetry." In Fourth International Conference on Computer Technology, Information Engineering, and Electron Materials (CTIEEM 2024), edited by Massimo Ficco and Yixian Yang. SPIE, 2025. https://doi.org/10.1117/12.3058571.

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Verma, Ajay Kumar, and Parveen Kumar Saini. "Analysis of Vibration Model to Study the Effect of Defect Sizes and Load on Stiffness, Contact Deformation, and Contact Force Variation in Deep Groove Ball Bearing." In 2024 8th International Conference on Materials Engineering and Nano Sciences & 2024 8th International Conference on Material Engineering and Manufacturing. Trans Tech Publications Ltd, 2024. http://dx.doi.org/10.4028/p-3oxxvp.

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In this paper, the vibration model has been suggested to study the local defects in the deep groove ball-bearing system. MATLAB is used to solve the equations governing the bearing system to simulate its vibration signals. The vibration model of the deep groove ball bearing system is constructed and takes into account the masses of the housing, balls, races, and shaft in addition to the damping at the ball-race interface and different-sized race defects. The effect of different defect sizes on the measured load distribution has been analyzed and discussed. The contact deformation and load dist
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Demailly, David, Fabrice Thouverez, Louis Jézéquel, and Jérôme Bonini. "Nonlinear Analysis of Rotor Systems Including a Bearing Clearance by the Multiple Shooting Method." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21770.

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Abstract In this paper the Multiple Shooting Method is briefly exposed. This method is then applied to a simplified model of a rotor/stator system including a bearing with clearance under static and unbalance forces. With bearing having a small amount of clearance, it is pointed out that the orbits are no longer circular at certain frequencies as for linear systems. If the clearance is large, the frequency response curve can be divided into three zones: a non-contact zone, a zone with one or several gains and looses of contact per period and a full contact zone. For both cases we emphasize on
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Zhu, Xiaocheng, Wanlai Lin, and Zhaohui Du. "Experimental and Computational Investigation of the Tip Clearance Flow for an Axial Ventilation Fan." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38673.

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The tip leakage flow in an axial ventilation fan with various tip clearances is investigated by experimental measurement and numerical simulation. The characteristic of a ventilation fan is an extreme low-pressure difference, a large tip clearance with a low rotating speed. A three dimensional PDA (Particle Dynamics Analysis) system is used for the measurement of the velocity field in the tip clearance region. The flow field is surveyed across the whole passage at fifteen axial locations (from 100% axial chord in front of the leading edge to 100% axial chord behind the trailing edge), mainly f
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Zhu, Jianmin, and Kwun-Lon Ting. "Uncertainty Analysis of Planar Robots With Joint Clearance." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/flex-6017.

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Abstract Joint clearance in mechanisms and robots leads to uncertainty in function deviation. Unlike the impact of the link tolerance on the performance quality, the uncertain effect of the joint clearance to the performance can not be eliminated by calibration because of the random nature. In this paper, based on the probability theory, a general probability density function for the output of planar robots is established for any probability density function of joint clearance. The result is demonstrated by a uniform distribution in the joint clearance and a table of the resulting functions is
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Qingdong, Li, Ye Jiaquan, Liang Fei, and Li Xin. "Airfield Clearance Zone Design Theory and Realization Based on Gauss Mid-Latitude Algorithm." In 2019 IEEE 5th International Conference on Computer and Communications (ICCC). IEEE, 2019. http://dx.doi.org/10.1109/iccc47050.2019.9064455.

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Al-Shudeifat, Mohammad A. "Piecewise Nonlinear Energy Sink." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47301.

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Symmetric piecewise nonlinearities are employed here to design highly efficient nonlinear energy sink (NES). These symmetric piecewise nonlinearities are usually called in the literature as dead-zone nonlinearities. The proposed dead-zone NES includes symmetric clearance about its equilibrium position in which zero stiffness and linear viscous damping are incorporated. At the boundaries of the symmetric clearance, the NES is coupled to the linear structure by either linear or nonlinear stiffness components in addition to similar viscous damping to that in the clearance zone. By this flexible d
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Ko, S. H., D. L. Rhode, and Z. Guo. "Computed Effects of Rim Seal Clearance and Cavity Width on Thermal Distributions." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-419.

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Axisymmetric solutions of the Reynolds averaged Navier-Stokes equations were obtained for the complete momentum/thermal interaction at the interface between the turbine hot mainstream and rim seal flow regions. Specifically, the 2-D, axisymmetric, fully elliptic form of the equations was solved in order to obtain detailed insight concerning the effect of the rim seal clearance and cavity width on the disk temperature, gap recirculation zone GRZ and rotational drag. The mainstream and purge flow rates, pressures and temperatures were selected to match those of a typical commercial engine. The d
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Liu, Zhaofang, Zhao Liu, and Zhenping Feng. "Unsteady Analysis on the Effects of Tip Clearance Height on Hot Streak Migration Across Rotor Blade Tip Clearance." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95255.

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This paper presents an investigation on the hot streak migration across rotor blade tip clearance in a high pressure gas turbine with different tip clearance heights. The blade geometry is taken from the first stage of GE-E3 turbine engine. Three tip clearances, 1.0%, 1.5% and 2.5% of the blade span with a flat tip were investigated respectively, and the uniform and non-uniform inlet temperature profiles were taken as the inlet boundary conditions. By solving the unsteady compressible Reynolds-averaged Navier-Stokes equations, the time dependent solutions were obtained. The results indicate th
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Senoo, Yasutoshi. "Mechanics on the Tip Clearance Loss of Impeller Blades." In ASME 1990 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/90-gt-037.

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For predicting the tip clearance loss of turbomachines, different equations are published in the literatures based on differnt principles. In 1986 the present author posturated a new theory where the pressure loss consisted of two parts, one was the pressure loss induced by the drag force of the leaked flow and the other was the pressure loss to support the axial pressure difference without blades in the tip clearance zone. There were comments such as the two losses were the same loss looked from two different view points, or at least a part of the former was included in the latter or vice ver
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Reports on the topic "Zone of clearance"

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Murshid, K. A. S., and Sokphally Tuot. The Cross Border Economy of Cambodia: An Exploration Study. Cambodia Development Resource Institute, 2005. https://doi.org/10.64202/wp.32.200504.

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This study attempts to examine four aspects relating to the cross border economy of Cambodia: a) The overall regulatory regime and evolving trade policy of Cambodia, including participation in international trading arrangements; b) Specific policy issues or strategies for development of cross-border trade, including participation in regional trading arrangements, setting up of special zones or provision of special privileges; c) Actual conduct and performance constraints of cross border trade arrangements, using illustrative case studies (e.g. garments trade, trade in shoes, vegetables etc.) w
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