Relevant bibliographies by topics / Miss Distance Indicator

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Miss Distance Indicator'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Miss Distance Indicator.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Miss Distance Indicator"

1

Czechowicz, Bogusław, and Teresa Buczkowska-Murawska. "Research Methodology of the Sleeve-Target System with Miss Distance Indicator of the Unmanned Aerial Target Imitator." Journal of KONBiN 51, no. 1 (2021): 125–47. http://dx.doi.org/10.2478/jok-2021-0009.

Full text
Abstract:
Abstract The article presents the method of using a modified acoustic miss distance indicator applied together with the set of controlled aerial target imitators (ZSMCP) Jaskółka “Swallow” operated in the Polish Armed Forces. The described method enables the implementation of controlling and testing the new CZT imitators and inspect the technical condition of these, which are still operated.
APA, Harvard, Vancouver, ISO, and other styles
2

Bayram, Mehmet, and Muzaffer Akat. "Market-neutral trading with fuzzy inference, a new method for the pairs trading strategy." Engineering Economics 30, no. 4 (2019): 411–21. http://dx.doi.org/10.5755/j01.ee.30.4.14350.

Full text
Abstract:
Financial pricing and prediction of stock markets is a specific and relatively narrow field, which have been mainly explored by mathematicians, economists and financial engineers. Prediction with the purpose of making profits in a martingale domain is a hard task. Pairs trading, a market neutral arbitrage strategy, attempts to resolve the drawback of unpredictability and yield market independent returns using relative pricing idea. If two securities have similar characteristics, so should their prices. Deviation from the acceptable similarity range in prices is considered an anomaly, and whenever noticed, trading is executed assuming the anomaly will correct itself.This work proposes a fuzzy inference model for the market-neutral pairs trading strategy. Fuzzy logic lets mimicking human decision-making in a complex trading environment and taking advantage of arbitrage opportunities that the crisp models may miss to acquire for the trade decision-making. Spread between two co-integrated stocks and volatility of the spread is used as decision-making inputs. Spread is a measure of the distance between two stocks and volatility is an indicator of how soon the spread would disappear. We conclude that fuzzy engine contributes to the profitability and efficiency of pairs trading type of strategies.
APA, Harvard, Vancouver, ISO, and other styles
3

Chhabra, Pragti, Kiran Guleria, Narinder Kumar Saini, Kannan Tupil Anjur, and Neelam Bala Vaid. "Pattern of severe maternal morbidity in a tertiary hospital of Delhi, India: a pilot study." Tropical Doctor 38, no. 4 (2008): 201–4. http://dx.doi.org/10.1258/td.2007.070327.

Full text
Abstract:
Severe maternal morbidity also known as ‘near miss’ may be a good indicator of the quality and effectiveness of obstetric care, as it may identify priorities in maternal care more rapidly than mortality alone. The objective of the study was to observe the pattern of severe maternal morbidity and its associated factors in a tertiary care hospital in Delhi. All patients admitted to the obstetrics and gynaecology department who fulfilled the definition of severe maternal morbidity conditions were included. A proforma was used to record sociodemographic, obstetric, antenatal care treatment and outcome details. A total of 63 women were included for analysis. The incidence of severe maternal morbidity was 3.3/100 deliveries. The mean age of the patients was 26.3 ± 5 years. More than half (55.5%) were uneducated: almost one-third (32%) were from outside Delhi – the median distance travelled was 10 km. The majority were antenatal admissions (68.3%). The proportion of postdelivery or abortion cases were greater among women who came from outside Delhi. Only 38.1% were registered during the antenatal period. The diagnoses were: eclampsia/pre-eclampsia (35%); haemorrhage (35%); sepsis (13%); obstructed labour (9.5%) and other medical conditions (11%). Severe anaemia was observed in 22% of cases. Only 43.5% were normal vaginal deliveries and 54.5% were delivered by caesarean section or with the use of instruments; 61.3% were live births. Hysterectomy was performed in 14.8%: the proportion of hysterectomy was higher in obstructed labour. Severe maternal morbidity cases constitute a significant burden on health resources.
APA, Harvard, Vancouver, ISO, and other styles
4

Leith, Douglas J., and Stephen Farrell. "Measurement-based evaluation of Google/Apple Exposure Notification API for proximity detection in a commuter bus." PLOS ONE 16, no. 4 (2021): e0250826. http://dx.doi.org/10.1371/journal.pone.0250826.

Full text
Abstract:
We report on the results of a measurement study carried out on a commuter bus in Dublin, Ireland using the Google/Apple Exposure Notification (GAEN) API. This API is likely to be widely used by Covid-19 contact tracing apps. Measurements were collected between 60 pairs of Android handset locations and are publicly available. We find that the attenuation level reported by the GAEN API need not increase with distance between handsets, consistent with there being a complex radio environment inside a bus caused by the metal-rich environment. Changing the people sitting in a pair of seats can cause variations of ±10dB in the attenuation level reported by the GAEN API. Applying the rule used by the Swiss Covid-19 contact tracing app to trigger an exposure notification to our bus measurements we find that no exposure notifications would have been triggered despite the fact that all pairs of handsets were within 2m of one another for at least 15 mins. Applying an alternative threshold-based exposure notification rule can somewhat improve performance to a detection rate of 5% when an exposure duration threshold of 15 minutes is used, increasing to 8% when the exposure duration threshold is reduced to 10 mins. Stratifying the data by distance between pairs of handsets indicates that there is only a weak dependence of detection rate on distance.
APA, Harvard, Vancouver, ISO, and other styles
5

Chen, Y. C. "The effect of proximity of a rail end in elastic-plastic contact between a wheel and a rail." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 217, no. 3 (2003): 189–201. http://dx.doi.org/10.1243/095440903769012894.

Full text
Abstract:
This paper investigates the effects of a free rail end on the contact stress distribution near the rail end by employing elastic-plastic finite element methods. The contact elements were used to simulate the interaction between a wheel and a rail. A plane strain model was used in this study. Variations in contact stress fields at various contact points near the rail end were compared. The availability of the Hertz contact theory in the region near the rail end was also investigated. The numerical results indicated that the contact stress distributions around the rail end are sensitive to the contact distance. The location of the maximum von Mises stress was shifted to the contact surface as the contact point moves close to the rail end. Results also show that the plastic zone size and the von Mises stress are increased gradually and extend to the rail end as the contact point moves near the rail end. A higher stress, larger deflection and serious plastic deformation occurring at the rail end may lead to deterioration and delamination at the rail end.
APA, Harvard, Vancouver, ISO, and other styles
6

Liu, Peng, Cheng Yuan Peng, Ge Li, Feng Xue, and Jia Qi Liu. "Research on Extra-Atmospheric Aircraft Modeling and Control Based on Maneuvering Target." Applied Mechanics and Materials 799-800 (October 2015): 1142–48. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.1142.

Full text
Abstract:
The extra-atmospheric aircraft model is established, and then the control system is designed. The control system consist of attitude control system and orbit control system, the attitude control system used PID controller and the orbit control system used augmented proportional navigation method. The traditional Proportional Navigation (PN) guidance law has higher accuracy. But for highly maneuvering targets, the accuracy of traditional PN guidance law is still not enough. An Augmented Proportional Navigation (APN) guidance law is designed, an acceleration compensation of the target is introduced on the basis of PN guidance law to overcome the effect of the acceleration on the guidance accuracy. And the engine control method is designed based on the fixed engine thrust. Simulation results indicated that, for homing against maneuverable targets, the APN guidance law is better than the PN guidance law in the following aspects: guidance accuracy is higher, miss distance is lower, interception time is shorter. And the new guidance law provides significant performance improvements over the commonly used classical proportional navigation law.
APA, Harvard, Vancouver, ISO, and other styles
7

Xu, Fengxiang, Fei Yan, Chao Wang, and Yuqiang Li. "Elastic analytical solutions and angular distributions near spot weld nugget in lap-shear specimens." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 1 (2017): 192–203. http://dx.doi.org/10.1177/0954405417718592.

Full text
Abstract:
Spot welding has been a remarkably important joint method for automotive body engineering. Based on a simplified two-dimensional analytical model in a lap-shear specimen, the elastic analytical solutions near spot weld nugget are theoretically derived to analyze stress distributions. A Cartesian coordinate system is centered at the center of the nugget, and the shear or resultant force acting on the nugget is marked as the positive x-direction. The results show that the normalized radial and hoop stresses are negative at the angle intervals between [66.25°, 113.75°] and [246.25°, 293.74°], while the normalized shear stress is negative at the angle intervals between [0°, 90°] and [180°, 270°]. It can be observed that the locations with the initial yielding failure change gradually from the normalized radial distance of 1.34 to the circumference of the spot weld nugget, and finally to the infinity as the angle increases. The normalized effective stress could approach to 1.84 as the normalized radial distance goes to infinity. In addition, the obtained analytical solutions are validated in the comparison with numerical results. The locations with peak Von Mises stresses along the circumference of the spot weld nugget have a good agreement with the analytical solutions. It indicates that the initial yielding locations would likely occur at the four special angles of the spot weld nugget. Therefore, the derived stress distributions in this study are beneficial for analyzing yielding failure behavior or evaluating damage evolution on engineering structures jointed with spot welds.
APA, Harvard, Vancouver, ISO, and other styles
8

Gao, Terry. "Detection and Tracking Cows by Computer Vision and Image Classification Methods." International Journal of Security and Privacy in Pervasive Computing 13, no. 1 (2021): 1–45. http://dx.doi.org/10.4018/ijsppc.2021010101.

Full text
Abstract:
In this paper, the cow recognition and traction in video sequences is studied. In the recognition phase, this paper does some discussion and analysis which aim at different classification algorithms and feature extraction algorithms, and cow's detection is transformed into a binary classification problem. The detection method extracts cow's features using a method of multiple feature fusion. These features include edge characters which reflects the cow body contour, grey value, and spatial position relationship. In addition, the algorithm detects the cow body through the classifier which is trained by Gentle Adaboost algorithm. Experiments show that the method has good detection performance when the target has deformation or the contrast between target and background is low. Compared with the general target detection algorithm, this method reduces the miss rate and the detection precision is improved. Detection rate can reach 97.3%. In traction phase, the popular compressive tracking (CT) algorithm is proposed. The learning rate is changed through adaptively calculating the pap distance of image block. Moreover, the update for target model is stopped to avoid introducing error and noise when the classification response values are negative. The experiment results show that the improved tracking algorithm can effectively solve the target model update by mistaken when there are large covers or the attitude is changed frequently. For the detection and tracking of cow body, a detection and tracking framework for the image of cow is built and the detector is combined with the tracking framework. The algorithm test for some video sequences under the complex environment indicates the detection algorithm based on improved compressed perception shows good tracking effect in the changing and complicated background.
APA, Harvard, Vancouver, ISO, and other styles
9

Roy, Subhashis, and Souvik Manna. "Low-radio frequency observations of seven nearby galaxies with GMRT." Monthly Notices of the Royal Astronomical Society 507, no. 4 (2021): 4734–51. http://dx.doi.org/10.1093/mnras/stab2441.

Full text
Abstract:
ABSTRACT We have observed seven nearby large-angular-sized galaxies at 0.33 GHz using Giant Metrewave Radio Telescope with an angular resolution of ∼10 arcsec and sub-mJy sensitivity. Using archival higher frequency data at 1.4 or ∼6 GHz, we have then determined their spatially resolved non-thermal spectrum. As a general trend, we find that the spectral indices are comparatively flat at the galaxy centres and gradually steepen with increasing galactocentric distances. Using archival far-infrared (FIR) MIPS 70-${\mu }\mathrm{m}$ data, we estimate the exponent of radio–FIR correlation. One of the galaxies (NGC 4826) was found to have an exponent of the correlation of ∼1.4. Average exponent from 0.33-GHz data for the rest of the galaxies was 0.63 ± 0.06 and is significantly flatter than the exponent 0.78 ± 0.04 obtained using 1.4-GHz data. This indicates cosmic-ray electron (CRe) propagation to have reduced the correlation between FIR and 0.33-GHz radio. Assuming a model of simple isotropic diffusion of CRe, we find that the scenario can explain the frequency-dependent CRe propagation length-scales for only two galaxies. Invoking streaming instability could, however, explain the results for the majority of the remaining ones.
APA, Harvard, Vancouver, ISO, and other styles
10

Luu, Ngoc Minh, Anh Tuan Dinh, Thi Thu Ha Nguyen, and Van Huy Nguyen. "Adherence to Antiplatelet Therapy after Coronary Intervention among Patients with Myocardial Infarction Attending Vietnam National Heart Institute." BioMed Research International 2019 (April 24, 2019): 1–7. http://dx.doi.org/10.1155/2019/6585040.

Full text
Abstract:
Adherence to antiplatelet therapy is critical to successful treatment of cardiovascular conditions. However, little has been known about this issue in the context of constrained resources such as in Vietnam. The objective of this study was to examine the adherence to antiplatelet therapy among patients receiving acute myocardial infarction interventions and its associated factors. In a cross-sectional survey design, 175 adult patients revisiting Vietnam National Heart Institute diagnosed with acute myocardial infarction were approached for data collection from October 2014 to June 2015. Adherence to antiplatelet therapy was assessed by asking patients whether they took taking antiplatelet regularly as per medication (do not miss any dose at the specified time) for any type of antiplatelet (aspirin, clopidogrel, ticlopidine...) during the last month before the participants came back to take re-examinations. The results indicated that the adherence to antiplatelet therapy among patients was quite high at 1 month; it begins to decline by 6 months, 12 months, and more than 12 months (less than 1 month was 90.29%; from 1 to 6 months 88.0%, from 6 to 12 months 75.43%, and after 12 months only 46.29% of patients). Multivariable logistic regression was utilized to detect factors associated with the adherence to antiplatelet therapy. It showed that patients with average income per month of $300 or more (OR=2.92, 95% CI=1.24-6.89), distance to the hospital of less than 50km (OR=2.48, 95% CI: 1.12-5.52), taking medicine under doctor’s instructions (OR=3.65; 95% CI=1.13-11.70), and timely re-examination (OR=3.99, 95% CI=1.08-14.73) were more likely to follow the therapy. In general, the study suggested that to increase the likelihood of adherence to antiplatelet therapy it is important to establish a continuous care system after discharging from hospital.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Miss Distance Indicator"

1

Grant, Eugene. "INTERCEPTOR TARGET MISSILE TELEMETRY." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/607598.

Full text
Abstract:
International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>A target missile is a unique piece of test hardware. This test tool must be highly reliable, low cost and simple and must perform any task that the developing interceptor missile planners require. The target missile must have ample power and guidance resources to put the target in a specified place in the sky at a desired time. The telemetry and measurement system for the target missile must have the same requirements as its interceptor missile but must be flexible enough to accept new requirements as they are applied to the target and its interceptor. The United States Army has tasked Coleman Aerospace to design and build this type of target missile. This paper describes and analyzes the telemetry and instrumentation system that a Hera target missile carries. This system has been flying for the past two years, has completed seven out of seven successful test flights and has accomplished all test objectives to date. The telemetry and instrumentation system is an integral part of the missile self-test system. All preflight checks and flight simulations are made with the on-board three-link telemetry system through a radio frequency (RF) link directly through the missile antenna system to a ground station antenna. If an RF transmission path is not available due to test range restrictions, a fiber-optic cable links the pulse code modulator (PCM) encoder to the receiving ground stations which include the bitsync, decommutator and recorders. With this capability, alternative testing is not limited by RF test range availability. The ground stations include two mobile stations and a factory station for all testing including preflight testing of the missile system prior to flight test launches. These three ground stations are built in a single configuration with additional equipment in the mobile units for use at remote locations. The design, fabrication, testing and utilization of these ground stations are reviewed. The telemetry system is a modification of the classical PCM system and will operate with its interceptor missile at least into the first decade from the year 2000.
APA, Harvard, Vancouver, ISO, and other styles
2

Thomson, R. G. W. "Vector acoustic miss distance indication." Master's thesis, University of Cape Town, 1985. http://hdl.handle.net/11427/21868.

Full text
Abstract:
In 1981 the author decided to investigate means of accurately measuring the passage of anti-aircraft shells past a towed airborne target. This decision was based on the observation that available literature showed a need for low cost miss distance indication equipment. A feasibility study showed that the task would be multi-disciplinary entailing aerodynamics telemetry, weapons performance studies and investigation of the techniques of measurement of shell location currently in use. The decision was made by the author to concentrate on a study of the technique measurements of shell location and the analysis of such measurements in view of the fact that, at least in isolation, knowledge of the other factors mentioned was fairly complete although unevenly spread in South Africa. Initial work concerned a study of the General Requirements for such target systems and the classification of these. A literature survey was conducted by the author which indicated that systems already in service made use of several measurement techniques, including photographic, radar and acoustic phenomena. Of these, acoustic means appeared to offer a cheap and simple solution to the measurement problem. The author then explored the principles and potential of Acoustic Miss Distance indication and arrived at the conclusion that such a system, based on measurements of the period of the shockwave accompanying a supers6nic shell, would be feasible. This conclusion led to the Thesis presented in this document, that firstly measurement of the shock-wave period could enable deduction of the distance between the sensor and the flight path of a supersonic shell and secondly, that several such measurements would enable the miss vector to be calculated.
APA, Harvard, Vancouver, ISO, and other styles
3

Meyer, Steven J. "SIDEWINDER MISSILE GPS RECEIVER TESTS." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607341.

Full text
Abstract:
International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>The use of Global Positioning System (GPS) receivers as a source to provide Time Space and Position Information (TSPI), and Miss Distance Indication (MDI) data in Test and Evaluation (T&E) applications is being considered. Specifically, GPS receivers are being evaluated to determine their usefulness as a sensor in a Sidewinder missile telemetry system (AN/DKT-80). Initial testing has indicated that position information generated from a GPS receiver can provide significantly better position data than a radar tracking system when using Double Differential error correction techniques. This concept requires a GPS reference station to be located in the general proximity of the Telemetry data-receiving site. Software has been developed that will compare GPS data from the airborne telemetry system to the GPS reference station and display a real-time TSPI solution. This software will also provide MDI information from two different airborne sources that are equipped with GPS receivers (missile and drone). To prove out this concept, a Commercial Off the Shelf (COTS) Commercially/Available (C/A) code GPS receiver was integrated into the AN/DKT-80 Sidewinder telemetry system (TM). A MQM-107 drone was instrumented with the same GPS receiver, as was a ground based reference station. A simple TM was developed for the drone that telemeters only the GPS data. The modified AN/DKT-80 system incorporated an Inertial Measurement Unit (IMU) into the design. Post processing software was developed that will integrate the IMU information with the GPS data so accurate position can be generated if the GPS data was momentarily lost. A missile firing is scheduled for the spring of 1999 to prove this concept.
APA, Harvard, Vancouver, ISO, and other styles
4

Maas, Bea. "Birds, bats and arthropods in tropical agroforestry landscapes: Functional diversity, multitrophic interactions and crop yield." Doctoral thesis, 2013. http://hdl.handle.net/11858/00-1735-0000-0022-5E77-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Miss Distance Indicator"

1

"This will be discussed later. Two species, Mansonia uniformis and Mansonia septempunctata, which breed in association with macrophytes such as water hyacinth Eichhornia crassipes, became less common from stage 1 to 2. The saltmarsh species Aedes vigilax was also collected in reasonable numbers at all localities around the reservoir. This species is known for its wide dispersal powers and was undoubtedly blown in from the extensive intertidal wetlands on the coast. Thus on the basis of abundance, two taxa – Culex annulirostris and Anopheles annulipes s.1. – warranted further consideration. The former species is considered to be the major vector of arboviruses in Australia (Russell 1995), transmitting Ross River, Barmah Forest, Kunjin, Kokobera, Alfuy and Edge Hill viruses and Murray Valley encephalitis, as well as dog heartworm. Of these, Ross River is by far the most common arbovirus in coastal northern Queensland, with morbidity approximating 400 cases per 100,000 population. Thus from first principles, this arbovirus and perhaps Barmah Forest, about which little is known, would constitute the greatest hazard to recreational use. Although Anopheles annulipes has previously been implicated in malaria transmission at Sellheim during the Second World War, this species group has returned isolated positives of Ross River and Barmah Forest viruses and Murray Valley encephalitis from other parts of Australia. However, no transmission studies have been done on the population from the reservoir. Thus on the evidence to date, it could not be regarded as a major concern at the Ross River dam. Both Culex annulirostris and Anopheles annulipes were shown to have seasonal peaks of abundance during the late post-wet season (March to May), with populations building up with the onset of spring (September to October). Spatially, the trapping programme was designed to compare mosquito numbers on the foreshore of the stage 1 lake with two localities expected to be on the margins of the stage 2A lake, with two remote localities (and therefore theoretically unaffected by any water resource project activity) as negative controls. Mosquito numbers (i.e. for those species known to breed at the dam) decreased with distance away from the Ross River dam. Both light trapping and human bait collections carried out twice per month were reasonable indicators of broad seasonal trends in mosquito abundance. However, the statistical analysis indicated that occasionally the light traps could miss short periods of high biting activity (Jones et al. 1991). If greater resolution was required, it was recommended that light traps could be supplemented with animal baited traps, although it is probable that this could be rectified by intensifying the light trapping regimen. Cluster analyses of dam breeding species in both 1984–85 and 1991–93 indicated that light trap catches along the northern (Big Bay, Ti-Tree Bay, Round Island) and western sides (Ross River) gave similar patterns, but the profile towards the east (Antill Creek, Toonpan, Oak Valley) was somewhat different (Barker-Hudson et al. 1993; Hearnden and Kay 1995). On this basis, adult mosquito surveillance would therefore need to be based on two localities at either end of the lake." In Water Resources. CRC Press, 1998. http://dx.doi.org/10.4324/9780203027851-31.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Miss Distance Indicator"

1

Bornstein, Jonathan A., and David B. Hillis. "Miss-distance indicator for tank main guns." In Aerospace/Defense Sensing and Controls, edited by Michael K. Masten and Larry A. Stockum. SPIE, 1996. http://dx.doi.org/10.1117/12.241929.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Bornstein, Jonathan A., and David B. Hillis. "Miss-distance indicator for tank main gun systems." In SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, edited by Michael K. Masten, Larry A. Stockum, Morris M. Birnbaum, and George E. Sevaston. SPIE, 1994. http://dx.doi.org/10.1117/12.178942.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Li, X., J. L. Gaddis, and T. Wang. "Mist/Steam Heat Transfer in Confined Slot Jet Impingement." In ASME Turbo Expo 2000: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0221.

Full text
Abstract:
Internal mist/steam blade cooling technology has been considered for the future generation of Advanced Turbine Systems (ATS). Fine water droplets about 5 μm were carried by steam through a single slot jet onto a heated target surface in a confined channel. Experiments covered Reynolds numbers from 7500 to 25000 and heat fluxes from 3 to 21 kW/m2. The experimental results indicate that the cooling is enhanced significantly near the stagnation point by the mist, decreasing to a negligible level at a distance of 6 jet widths from the stagnation region. Up to 200% heat transfer enhancement at the stagnation point was achieved by injecting only ∼1.5% of mist. The investigation has focused on the effects of wall temperature, mist concentration, and Reynolds number.
APA, Harvard, Vancouver, ISO, and other styles
4

Wang, Ting, J. Leo Gaddis, and Xianchang Li. "Mist/Steam Heat Transfer of Multiple Rows of Impinging Jets." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-54206.

Full text
Abstract:
Internal mist/steam blade cooling technology is considered the future of high-temperature gas turbine systems that burn hydrogen or synthetic gases. This paper experimentally investigates the mist/steam heat transfer of three rows of circular jet impingement in a confined channel. Fine water droplets with an average diameter of 3-μm are generated by atomizing water through small nozzles under high pressure. The circular jets have a uniform diameter of 8-mm, and the distance between adjacent jets in a row is 3 diameters. Jets in different rows are staggered and the distance between rows is 1.5 diameters. The spacing of nozzle-to-target is 2.8 diameters. Experiments were conducted with Reynolds numbers at 7,500 and 15,000 and heat fluxes ranging from 3,350 to 13,400W/m2. The results indicate that the wall temperature significantly decreased because of mist injection. A region of high cooling enhancement is observed and more extensive than those employing one row of circular jets or a slot jet. While the details depend on flow conditions, it is seen that the enhanced region of 3-row jets is about 5 jet diameters at Re = 7,500, q” = 7.54 kW/m2, and ml/ms = 3.5%, compared to 2 jet diameters for single-row jets. The enhancement becomes negligible after a certain distance downstream. The maximum local cooling enhancement is up to 800% by injecting 3.5% of mist at low heat flux condition and 150% for high heat flux condition. The average cooling enhancement can achieve more than 100% within 2 jet-diameter distance from the stagnation line at Re = 15,000 and ml/ms = 1.5%.
APA, Harvard, Vancouver, ISO, and other styles
5

Kearns, Don, Jian-Hua Du, Ruey-Hung Chen, and Louis C. Chow. "Study on Spray Mist Cooling Between Two Adjacent Parallel Boards." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47297.

Full text
Abstract:
Experiments of dielectric liquid spray mist cooling of a row of 9, 38 mm square heaters located along one side of a 400 mm channel formed by two adjacent parallel boards were carried out. The objective was to determine the heat removal capability of the approach as a function of heater downstream distance from a single atomizer for channel height (board pitch) and orientation effects. Fundamental characteristics of the spray field and heat transfer were sought and no attempt was made to optimize the system for high heat transfer rate. The fluid used was FC-72 which as delivered into the gap between the boards by a full-cone TG0.3 atomizer oriented parallel to the row of heaters. The results indicate that heat transfer in the upstream region is dominated by droplet impingement which depends on the board pitch. The heat removal at the leading heater is up to 4 W/cm2 at 60°C uniform heater temperature. The heat transfer rate in the downstream region is determined by the flow pattern of the liquid film on the boards, which in turn depends on droplet behavior between the boards. For the horizontal orientation, gravitational forces cause the droplets to fall onto the heated board and improve heat transfer in the middle region along the heaters. This effect was enhanced and heat transfer coefficient was improved with the increase of liquid temperature which is consistent with the phenomena observed in the experiments. For the vertical orientation, gravitational effects do not appear to have an effect on heat transfer. Flow pattern of liquid film in the downstream region is heavily affected by the liquid distribution in the upstream region in the vertical orientation. In this case, the liquid film pattern was preserved and shifted downstream when the power to the upstream heaters was turned off. The heat removal at the “leading” heater at a specific uniform heater temperature is shown to depend on the subcooling of liquid for both orientations.
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Xiangyu, Kun Xiao, and Zhenping Feng. "Study on Cooling Characteristics of an Internal Cooling Structure With a Sloping Sheet for Gas Turbine Blade." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76625.

Full text
Abstract:
This study presents a cooling structure with a sloping sheet to improve the internal cooling of gas turbine blades, inspired by the concept of aircraft wing tip vortex. In this paper, the numerical simulation for the sloping sheet cooling structure has been carried out, which takes into account the heat conduction of the metallic material and the heat transfer of the external high temperature flow field. The results indicate that the structure utilizes the pressure difference between two sides of the sloping sheet to produce a strong vortex pair. The vortexes are led to the inner wall surface of the turbine blade by the downwash. Thanks to such a strong pair vortex, the high temperature air close to the inner wall is quickly blown out and the low temperature coolant is induced to impact on the internal surface, thus achieving an efficient cooling effect. Due to the strong vortex strength and the same vortex vector along the coolant flows, the pair vortex will travel a long distance in the cooling channel, and cool larger areas of the inner wall surface. According to the calculation results, such structure can make the overall temperature of the solid region decreased by 40K as compared to the smooth channel. The sloping sheet cooling structure can reduce the total pressure loss by 63% as compared to the array of pin fins which achieve the same cooling effect. Furthermore, the influence of the sloping sheet’s inclination angle, length and width on the cooling characteristics has also been studied. Through the strength analysis by FEM method, the maximum von Mises stress is 21.9 MPa and it verifies that the sloping sheet can work securely and firmly.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Miss Distance Indicator' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography