Relevant bibliographies by topics / Frequencies of oscillating systems Frequency stability

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

Academic literature on the topic 'Frequencies of oscillating systems Frequency stability'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Frequencies of oscillating systems Frequency stability"

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Alifov, A. A. "About mixed forced, parametric and self-oscillations by limited excitation and delayed elasticity." PNRPU Mechanics Bulletin, no. 3 (December 15, 2020): 12–19. http://dx.doi.org/10.15593/perm.mech/2020.3.02.

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Mixed forced, parametric, and self-oscillations are considered if there is a delay in the elastic force in the system. A dynamic model is a friction self-oscillation system describing the frictional self-oscillations that occur in many technical systems for various purposes (metal-cutting machines, textile equipment, brakes and a number of other engineering objects). The operation of the system is supported by the energy source of limited power. For the analysis we used the method of straight linearization which is easier than the known methods of analysis of nonlinear systems, has no time-con
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Fu, Hailing, Stephanos Theodossiades, Ben Gunn, Imad Abdallah, and Eleni Chatzi. "Ultra-low frequency energy harvesting using bi-stability and rotary-translational motion in a magnet-tethered oscillator." Nonlinear Dynamics 101, no. 4 (2020): 2131–43. http://dx.doi.org/10.1007/s11071-020-05889-9.

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Abstract Harvesting ultra-low frequency random vibration, such as human motion or turbine tower oscillations, has always been a challenge, but could enable many potential self-powered sensing applications. In this paper, a methodology to effectively harness this type of energy is proposed using rotary-translational motion and bi-stability. A sphere rolling magnet is designed to oscillate in a tube with two tethering magnets underneath the rolling path, providing two stable positions for the oscillating magnet. The generated magnetic restoring forces are of periodic form with regard to the sphe
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Olgac, Nejat, Hakan Elmali, Martin Hosek, and Mark Renzulli. "Active Vibration Control of Distributed Systems Using Delayed Resonator With Acceleration Feedback." Journal of Dynamic Systems, Measurement, and Control 119, no. 3 (1997): 380–89. http://dx.doi.org/10.1115/1.2801269.

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The Delayed Resonator (DR) and Dual Frequency Fixed Delayed Resonator (DFFDR) are newly introduced control techniques for active vibration absorption. Both methods propose a delayed position feedback within the absorber section of the structure to impart ideal resonance features to the absorber. When installed on an oscillating primary body, they form “notch filters” at their resonance frequencies attenuating the response of the primary structure. The DR absorber is shown to be real-time tunable to time varying disturbance frequencies. In this article, a number of new issues are considered. Fi
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Abdel-moamen, Dalia, M. Abdel-Rhman, R. A. Swief, and M. Abdel-Lattif Badr. "On the Natural Frequency of Oscillations of Induction Motors." Academic Research Community publication 2, no. 4 (2019): 447. http://dx.doi.org/10.21625/archive.v2i4.388.

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For transient stability analysis, the rotor dynamics of the induction motor have to be included. These dynamics affect the system stability when severe disturbances hit it and cause frequency deviations. For large systems, frequency deviations are small. However, it may cause loss of synchronism and break the system into smaller areas. Motor loads are sensitive to system frequency deviations. Any change in the grid frequency, changes extremely the slip. This follows by changes of the motor torque and the motor speed. The demanded active and reactive powers change as well. Natural frequencies o
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ALMa’aitah, Mohammad A., Tha’er O. Sweidan, Mohammed I. Abuashour, and Mohammed Al-Hattab. "Analysis of Inter Area Power System Oscillation using Eigenvalue Method." International Journal of Contemporary Research and Review 9, no. 06 (2018): 20417–37. http://dx.doi.org/10.15520/ijcrr/2018/9/06/514.

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One of the power system crucial problems for stability is the oscillation at low frequencies. The low frequency oscillation (LFO) is a small signal stability of the power system and has a passive impact on the maximum power transfer (load flow) in power systems. The inter area oscillation using eigenvalue method is presented and analyzed by modeling and linearizing the system around the operating point. This paper introduces the inter area oscillation using Eigen value method by presenting and discussing a proposed power system of two-area, 4-machine into two different cases: The first case is
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Gelozhe, Yuri, Pavel Klimenko, and Aleksander Maksimov. "Formation the radio signal for the system of space-time signal processing." ITM Web of Conferences 30 (2019): 03011. http://dx.doi.org/10.1051/itmconf/20193003011.

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The work is devoted to digital information transmission systems using space-time signal processing. The formation of radio signals whose carrier frequencies are determined by the frequency-time matrices is considered. The signal shaper is based on a PLL system with a programmable frequency divider. The analysis of the processes in the phase automatic system under the influence of large destabilizing factors and frequency switching of the generated oscillations is carried out. It is theoretically and experimentally shown that in the above-mentioned conditions the automatic system may lose stabi
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Kobelev, V. "Effect of static axial compression on the natural frequencies of helical springs." Multidiscipline Modeling in Materials and Structures 10, no. 3 (2014): 379–98. http://dx.doi.org/10.1108/mmms-12-2013-0078.

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Purpose – The purpose of this paper is to address the practically important problem of the load dependence of transverse vibrations for helical springs. At the beginning, the author develops the equations for transverse vibrations of the axially loaded helical springs. The method is based on the concept of an equivalent column. Second, the author reveals the effect of axial load on the fundamental frequency of transverse vibrations and derive the explicit formulas for this frequency. The fundamental natural frequency of the transverse vibrations of the spring depends on the variable length of
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Panosyan, Ara. "Optimization based power system stabilizer tuning." at - Automatisierungstechnik 69, no. 5 (2021): 376–88. http://dx.doi.org/10.1515/auto-2021-0012.

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Abstract The most cost-effective method to improve the damping of low frequency electromechanical oscillations in interconnected power systems is the use of Power System Stabilizers (PSS), which act as supplementary controllers in the generator excitation system. In general, the performance of a power system stabilizer depends on the proper tuning of its parameters, to ensure a positive contribution to the small signal stability of the power system, without negatively impacting its transient stability. This paper will discuss the different roles of the excitation system automatic voltage regul
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Huang, Shu-Wei, Jinghui Yang, Mingbin Yu, et al. "A broadband chip-scale optical frequency synthesizer at 2.7 × 10−16 relative uncertainty." Science Advances 2, no. 4 (2016): e1501489. http://dx.doi.org/10.1126/sciadv.1501489.

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Optical frequency combs—coherent light sources that connect optical frequencies with microwave oscillations—have become the enabling tool for precision spectroscopy, optical clockwork, and attosecond physics over the past decades. Current benchmark systems are self-referenced femtosecond mode-locked lasers, but Kerr nonlinear dynamics in high-Q solid-state microresonators has recently demonstrated promising features as alternative platforms. The advance not only fosters studies of chip-scale frequency metrology but also extends the realm of optical frequency combs. We report the full stabiliza
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Nasir, Rizal E. M., and Wahyu Kuntjoro. "Longitudinal Flight Stability Augmentation of a Small Blended Wing-Body Aircraft with Canard as Control Surface." Applied Mechanics and Materials 393 (September 2013): 329–37. http://dx.doi.org/10.4028/www.scientific.net/amm.393.329.

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Transient response of an aircraft in longitudinal motion has two modes of oscillatory motion short period mode and phugoid modes and failure to achieve satisfactory level would mean poor flying and handling qualities leading to unnecessary pilot workload. This study proposes a stability augmentation system (SAS) in longitudinal flying modes for steady and level flight at all airspeeds and altitudes within Baseline-II E-2 BWBs operational flight envelope (OFE). The main controlling component of this stability augmentation system is a set of canard, a control surface located in front of the wing
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Dissertations / Theses on the topic "Frequencies of oscillating systems Frequency stability"

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Chen, Jian. "Accurate frequency estimation with phasor angles." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12042009-020203/.

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Ruiz, Pérez Juan José. "Maximizing the stability of an ensemble of clocks /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FRuiz.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, September 2003.<br>Thesis advisor(s): Alan Washburn, Paul Sanchez. Includes bibliographical references (p. 79-81). Also available online.
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McLaughlin, John J. "Applications of operator theory to time-frequency analysis and classification /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/5861.

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Faruquee, Muhammad Zakir Husein. "Implementation of output-only identification methods with demonstration on the experimental boom /." [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16245.pdf.

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Ma, Jinge. "Design of Frequency Output Pressure Transducer." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804933/.

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Piezoelectricity crystal is used in different area in industry, such as downhole oil, gas industry, and ballistics. The piezoelectricity crystals are able to create electric fields due to mechanical deformation called the direct piezoelectric effect, or create mechanical deformation due to the effect of electric field called the indirect piezoelectric effect. In this thesis, piezoelectricity effect is the core part. There are 4 parts in the frequency output pressure transducer: two crystal oscillators, phase-locked loop (PLL), mixer, frequency counter. Crystal oscillator is used to activate th
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Calitz, Wilken Craill. "A multidisciplinary study of the phenomenon of violin vibrato." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1792.

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Thesis (MMus (Music))--University of Stellenbosch, 2009<br>Violin vibrato is the action by which a violinist periodically changes the frequency of a sustained note by moving the finger on the string, rapidly backwards and forwards. If it is artistically applied, it adds life, character and warmth to an otherwise dull sounding note. Although it has been used since the sixteenth century, very little research has been done on the reason why humankind would experience such periodic fluctuations as an object of beauty in violin performance. In answering the question, this study explores a variety
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Hojatpanah, Roozbeh. "Empirical study of acoustic instability in premixed flames: measurements of flame transfer function." 2012. http://hdl.handle.net/1805/3366.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>In order to conform to pollutant-control regulations and minimize NOx emissions, modern household boilers and central heating systems are moving toward premixed combustors. These combustors have been successful with regards to emissions along with efficiency. However, their implementation has been associated with acoustical instability problems that could be solved through precise optimization in design rather than trial and error experimentation. This thesis introduces an experimental apparatus, which is designed to investigat
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Books on the topic "Frequencies of oscillating systems Frequency stability"

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Frequency stability: Introduction and applications. Wiley, 2012.

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Tripp, John S. Rapid estimation of frequency response functions by close-range photogrammetry. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Marchi, Andrea. Frequency Standards and Metrology: Proceedings of the Fourth Symposium, Ancona, Italy, September 5-9, 1988. Springer Berlin Heidelberg, 1989.

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Group, Chronos. Frequency measurement and control. Springer, 1994.

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European Frequency and Time Forum. (10th 1996 Brighton, England). 10th European Frequency and Time Forum: 5-7 March 1996. IEE, 1996.

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M, Burkin I., and Shepeljavyi A. I, eds. Frequency methods in oscillation theory. Kluwer Academic, 1996.

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Anne-Catherine, Favre, and Musy A, eds. Predictive hydrology: A frequency analysis approach. CRC Press, 2012.

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Kamas, George. Time and frequency users manual. U.S. Dept. of Commerce, National Institute of Standards and Technology, 1990.

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Kamas, George. Time and frequency users manual. U.S. Dept. of Commerce, National Institute of Standards and Technology, 1990.

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service), SpringerLink (Online, ed. Discontinuous control systems: Frequency-domain analysis and design. Birkhäuser, 2009.

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Conference papers on the topic "Frequencies of oscillating systems Frequency stability"

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Eisinger, Frantisek L., and Robert E. Sullivan. "Prediction of Thermoacoustic Vibration of Burner/Furnace Systems in Utility Boilers." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26090.

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Seven burner/furnace systems, three of which vibrated and four of which did not vibrate in operation are evaluated for thermoacoustic oscillations. The evaluation is based on the Rijke and Sondhauss models representing the combined burner/furnace (cold/hot) thermoacoustic systems. Frequency differences between the lowest vulnerable furnace acoustic frequencies in the burner axial direction and those of the systems’ Rijke and Sondhauss frequencies are evaluated to check for resonances. Most importantly, the stability of the Rijke and Sondhauss models is checked against the published design stab
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Berger, Frederik M., Tobias Hummel, Bruno Schuermans, and Thomas Sattelmayer. "Pulsation-Amplitude-Dependent Flame Dynamics of High-Frequency Thermoacoustic Oscillations in Lean-Premixed Gas Turbine Combustors." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63997.

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This paper presents the experimental investigation of pulsation-amplitude-dependent flame dynamics associated with transverse thermoacoustic oscillations at screech level frequencies in a generic gas turbine combustor. Specifically, the flame behavior at different levels of pulsation amplitudes is assessed and interpreted. Spatial dynamics of the flame are measured by imaging the OH* chemiluminescence signal synchronously to the dynamic pressure at the combustor’s face plate. First, linear thermoacoustic stability states, modal dynamics, as well as flame-acoustic phase relations are evaluated.
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Eisinger, Frantisek L., and Robert E. Sullivan. "Evaluation of Non-Vibrating Utility Burner/Furnace Systems for Resistance to Thermoacoustic Oscillations." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93054.

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Six burner/furnace systems which operated successfully without vibration are evaluated for resistance to thermoacoustic oscillations. The evaluation is based on the Rijke and Sondhauss models representing the combined burner/furnace (cold/hot) thermoacoustic systems. Frequency differences between the lowest vulnerable furnace acoustic frequencies in the burner axial direction and those of the systems’ Rijke and Sondhauss frequencies are evaluated to check for resonances. Most importantly, the stability of the Rijke and Sondhauss models is checked against the published design stability diagram
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Lin, Yuh-Ger, Jin-Der Lee, Shao-Wen Chen, and Jinn-Jer Peir. "The Resonance Effect of External Vertical Vibration on a Single Nuclear-Coupled Boiling Channel System With Forced Flows." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66137.

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The present study adopts the single nuclear-coupled boiling channel model integrated with oscillating vertical seismic accelerations to investigate the seismic-induced effect on a single nuclear-coupled boiling channel system. The nonlinear dynamics and stabilities of a single nuclear-coupled boiling channel are investigated through nonlinear analyses. The void-reactivity feedback would destabilize the system as that reported in the literatures. The natural frequencies of the stable states are widely explored. The results indicate that the natural frequency of initial state could depend on the
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Alden, Zach, Gunnar Maples, Kristofer Dressler, Gregory Nellis, and Arganthaël Berson. "Conditional Stability of Direct Contact Steam Condensation." In ASME 2020 Heat Transfer Summer Conference collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ht2020-9018.

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Abstract An investigation into the conditional stability of direct contact steam condensation is presented. Direct contact steam condensation systems heat process fluids more effectively than indirect contact heat exchangers because the total energy of the steam is introduced directly into the process fluid, bypassing any resistances associated with having to cross the heat exchanger boundary. In the present work, superheated steam is injected perpendicular to a flow of subcooled liquid water. Conditional stability of direct contact steam condensation stems from the type of fluctuations exhibi
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Quaglia, C. F., and R. S. Cant. "Prediction of Thermoacoustic Oscillations With a Linearised Euler Methodology." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43804.

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Combustion instabilities in the aviation, aerospace and power generation industries have been a matter of concern for engineers since the 1950s, but with the increase in computer processing speed and the development of CFD it is now possible to attempt to predict frequencies and stability of a combustion system by numerical means, or by combining numerical, analytical and experimental approaches. Currently available analytical methods for the prediction of the frequency and stability of thermoacoustic oscillations make use of one-dimensional models where the frequency of oscillation is assumed
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Speth, Raymond L., H. Murat Altay, Duane E. Hudgins, and Ahmed F. Ghoniem. "Dynamics and Stability Limits of Syngas Combustion in a Swirl-Stabilized Combustor." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51023.

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The combustion dynamics, stability bands and flame structure of syngas flames under different operating conditions are investigated in an atmospheric pressure swirl-stabilized combustor. Pressure measurements and high-speed video data are used to distinguish several operating modes. Increasing the equivalence ratio makes the flame more compact, and in general increases the overall sound pressure level. Very close to the lean blowout limit, a long stable flame anchored to the inner recirculation zone is observed. At higher equivalence ratios, a low frequency, low amplitude pulsing mode associat
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Chen, Peter Y. P., E. J. Hahn, and G. Y. Wang. "Subharmonic Oscillations in Squeeze Film Damped Rotor Bearing Systems Without Centralizing Springs." 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-428.

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This paper investigates the nonsynchronous motion of a rigid rotor in squeeze film damped systems without spring support subjected to both unbalance and unidirectional loading. Both harmonic balance and 4th order Runge–Kutta integration are used to obtain the unbalance response, the asymptotic stability of the harmonic balance equilibrium solutions being determined by Floquet theory. Depending on the system parameters stable subharmonic orbits with fundamental frequencies of half, one third and one quarter of excitation frequency were obtained. Also, bistable, tristable and quadristable soluti
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Kashinath, Karthik, Santosh Hemchandra, and Matthew P. Juniper. "Nonlinear Phenomena in Thermoacoustic Systems With Premixed Flames." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68726.

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Nonlinear analysis of thermoacoustic instability is essential for prediction of frequencies, amplitudes and stability of limit cycles. Limit cycles in thermoacoustic systems are reached when the energy input from driving processes and energy losses from damping processes balance each other over a cycle of the oscillation. In this paper an integral relation for the rate of change of energy of a thermoacoustic system is derived. This relation is analogous to the well-known Rayleigh criterion in thermoacoustics, but can be used to calculate the amplitudes of limit cycles, as well as their stabili
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Saha, Pankaj, Pete Strakey, and Donald Ferguson. "Numerical Investigations of Instabilities in a Natural Gas-Air Fueled Rotating Detonation Engine." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91643.

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Abstract Recent numerical and experimental studies of Rotating Detonation Engines (RDEs) using air as the oxidizer have primarily focused on the ability to sustain a stable continuous detonation wave when fueled with hydrogen. For RDEs to be a viable technology for land-based power generation it is necessary to explore the ability to detonate natural gas and/or coal-syngas with air in the confines of the annular geometry of an RDE. There are major challenges in obtaining a stable detonation wave for a natural gas–air fueled RDE and to a lesser extent for coal-syngas and air. Recently published
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