Experimental investigation on noise radiation characteristics of pulse detonation engine–driven ejector

Huang, Xiqiao; Li, Moqi; YuanYuan, Yuan; Xiong, Yuefei; Zheng, Longxi

doi:10.1177/1687814015586934

Cited by 7 publications

(3 citation statements)

References 19 publications

(38 reference statements)

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“…Huang and Bavolar have also found that the combination of different environmental factors reduces performance. In other words, if their combined effects are more than those of their individual effect, they can intensify each other’s effects and have a similar effect mechanism; however, if the combined effects of environmental risk factors are equal to those of their individual effect, they will most likely have a separate effect 44 , 45 .…”

Section: Discussionmentioning

confidence: 99%

Effects of Light on Attention and Reaction Time: A Systematic Review

et al. 2021

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Background: Accuracy, speed, efficiency, and applicability of activities in the workplace are among the most important effective factors on people's productivity, which is in turn affected by environmental factors, such as light. Therefore, the present research aimed to review the studies performed about the effects of light on attention and reaction time. Sudy Design: A systematic review. Methods: This review study systematically searched articles from 2000-2019 in databases of Google Scholar, ISC, SID, Magiran, Web of Science, Science Direct, PubMed, and Scopus using keywords of light, lighting, attention, and reaction time. The titles and abstracts of articles containing relevant results over the past 20 years were extracted. Thereafter, they were categorized and analyzed according to the title, author name, publication year, study method, study type, and evaluation results. Results: Based on the results, the light with shorter wavelengths, higher intensity, and higher color temperature led to suppressed melatonin, higher consciousness, less somnolence, increased attention, and faster reaction time. Simultaneous exposure to harmful levels of environmental factors affects cognitive and physiological parameters, acting independently with a separate mechanism or synergistically with a similar mechanism. The best light in the regulation of psychological, biological, and cognitive processes is bright daylight in the morning with a short wavelength, high intensity, and more lasting effects. Conclusion: As evidenced by the obtained results, light is a powerful modulator of non-visual performance in cognitive tasks. The wavelength, color temperature, and light intensity modulate brain responses to cognitive tasks, including attention and reaction time. Therefore, these parameters, along with personal and environmental factors, should be considered in designing and using light.

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Section: Discussionmentioning

confidence: 99%

Effects of Light on Attention and Reaction Time: A Systematic Review

et al. 2021

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“…Korobov and Golovastov [58] studied the ejector influence effectiveness of a detonation engine and their results showed that the use of an ejector can yield thrust augmentation by 17%. Huang et al [59] experimentally studied the noise radiation characteristics of multicycle pulse detonation engine with and without ejectors.…”

Section: Reviews On Experimental Analysismentioning

confidence: 99%

Review on Recent Advances in Pulse Detonation Engines

Pandey

Debnath

2016

Journal of Combustion

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Pulse detonation engines (PDEs) are new exciting propulsion technologies for future propulsion applications. The operating cycles of PDE consist of fuel-air mixture, combustion, blowdown, and purging. The combustion process in pulse detonation engine is the most important phenomenon as it produces reliable and repeatable detonation waves. The detonation wave initiation in detonation tube in practical system is a combination of multistage combustion phenomena. Detonation combustion causes rapid burning of fuel-air mixture, which is a thousand times faster than deflagration mode of combustion process. PDE utilizes repetitive detonation wave to produce propulsion thrust. In the present paper, detailed review of various experimental studies and computational analysis addressing the detonation mode of combustion in pulse detonation engines are discussed. The effect of different parameters on the improvement of propulsion performance of pulse detonation engine has been presented in detail in this research paper. It is observed that the design of detonation wave flow path in detonation tube, ejectors at exit section of detonation tube, and operating parameters such as Mach numbers are mainly responsible for improving the propulsion performance of PDE. In the present review work, further scope of research in this area has also been suggested.

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“…The straight cylindrical ejector had a global reduction on overall SPL at all directivity angles, and the maximum attenuation levels of 6.8 dB were observed under certain conditions. Huang et al [13] also explored the far-field noise radiation characteristics of ejectors installed on a PDE. The experimental results also showed that ejectors could decrease the peak SPL and the maximum reduction was approximately 8.5 dB.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the influence of annular nozzle on acoustic characteristics of detonation sound wave generated by pulse detonation engine

Kang¹,

Li²,

Huang³

et al. 2022

Chinese Phys. B

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Acoustic characteristics of the detonation sound wave generated by a pulse detonation engine with an annular nozzle, including peak sound pressure, directivity, and A duration, are experimentally investigated while utilizing gasoline as fuel and air as oxidizer. Three annular nozzle geometries are evaluated by varying the ratio of inner cone diameter to detonation tube exit diameter from 0.36 to 0.68. The experimental results show that the annular nozzles have a significant effect on the acoustic characteristics of the detonation sound wave. The annular nozzles can amplify the peak sound pressure of the detonation sound wave at 90 deg while reducing it at 0 deg and 30 deg. The directivity angle of the detonation sound wave is changed by annular nozzles from 30 deg to 90 deg. The A duration of the detonation sound wave at 90 deg is also increased by the annular nozzles. These changes indicate that the annular nozzles have an important influence on the acoustic energy distribution of the detonation sound wave, which amplify the acoustic energy in a direction perpendicular to the tube axis and weaken it along the direction of the tube axis.

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Experimental investigation on noise radiation characteristics of pulse detonation engine–driven ejector

Cited by 7 publications

References 19 publications

Effects of Light on Attention and Reaction Time: A Systematic Review

Effects of Light on Attention and Reaction Time: A Systematic Review

Review on Recent Advances in Pulse Detonation Engines

Experimental study of the influence of annular nozzle on acoustic characteristics of detonation sound wave generated by pulse detonation engine

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