On acoustic stimulation of atmospheric precipitation

Galechyan, G. A.

doi:10.1134/1.2051461

Cited by 11 publications

(10 citation statements)

References 6 publications

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“…The application of acoustic coagulation in artificial precipitation was first proposed by Russian scientists in the 1950s (Mednikov, 1965). However, the technology could not be widely used in the last century due to some insurmountable limitations (Galechyan, 2005;Tulaikova & Amirova, 2015). Those limitations mainly are (1) knowledge shortage of physical mechanism of acoustic wave impact on precipitation stimulation, (2) manufacture of the devices for providing strong acoustic waves which can propagate to high sky with an altitude of several hundreds or even 1 to 2 kilometers, (3) a cloud and precipitation monitoring system for obtaining acoustic impacts on clouds and then precipitation, and (4) an effective method to evaluate the efficiency of acoustic wave impacts on stimulation of precipitation quantitatively.…”

Section: Literature Review Of Acoustic Wave Impacts On Precipitationmentioning

confidence: 99%

“…Meanwhile, there are several major difficulties in promoting the seeding technology (Wu et al, 2018), which include the high cost of operation, the risk of pollution (Fisher et al, 2018;Korneev et al, 2017), and the efficient method for evaluating rainfall enhancement. Thereafter, emerging technologies, such as acoustic coagulation (Galechyan, 2005), laser-induced condensation (Leisner et al, 2013) and atmospheric ionization (Tan et al, 2016), have attracted more attention. Among them, acoustic coagulation has the advantages of low cost and environment friendly (Wei et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Statistic evaluation of low-frequency acoustic wave impact on rainfall stimulation

Wang

Chen

et al. 2022

Stoch Environ Res Risk Assess

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For securing sustainable water resources, traditional solutions including seawater desalination are limited due to high cost and restricted operating conditions.Plateau. Statistical analysis was applied to evaluate the effect of acoustic wave on rainfall stimulation. The results of average rainfall intensity distribution using ordinary least square analysis disclose that acoustic interference has a considerable effect on rainfall enhancement. Such a rainfall enhancement effect increases significantly along with the increase of rainfall duration which is the index of cloud precipitation potential.For rainfall events with the duration more than two hours, the average rainfall intensity was improved by 72% with the acoustic wave effect over the experiment site. The phenomena are consistent with the fact that clouds with larger precipitation potential contain more cloud droplets which are beneficial to the acoustic coagulation process.

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Section: Literature Review Of Acoustic Wave Impacts On Precipitationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Statistic evaluation of low-frequency acoustic wave impact on rainfall stimulation

Wang

Chen

et al. 2022

Stoch Environ Res Risk Assess

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“…Below we will find the range of values of parameter b, in which approximate equality K ≈ K z is fulfilled, and will analyze physical reasons for the difference between these values outside of this range. But first we derive the expression for the acous tic wave energy in a certain volume V. It is known that the specific energy of a gas (liquid) is given by (10) or, accurate to the second order terms in perturba tions of the gas parameters relative to the equilibrium values for u = 0 [15], (11) As before, the primed variables denote here the perturbation of the equilibrium parameters; e is the internal specific energy of the gas; and the variables with subscript "0" denote their equilibrium value for u = 0. Term ρ 0 e 0 can be omitted since it is not con nected with the acoustic wave.…”

Section: Propagation Of Acoustic Waves In a Mediummentioning

confidence: 99%

“…This is primarily due to important applications of this fundamental physical phenomenon. The importance of research in this field due to the attempts to control condensation processes in the atmosphere with the help of powerful acoustic waves and using the effects of sound amplification in nonequilibrium vibrationally excited gases was pointed out in [9,10]. The development of the meth ods for attenuation of acoustic waves for aerospace applications was considered in [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Propagation of acoustic waves in a medium with the Rayleigh energy release mechanism

2012

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This research continues theoretical studies of propagation of acoustic waves in a plasma consider ing it in the context of a Rayleigh medium. For the first time, the solution to the problem with the boundary and not the initial conditions is examined. It is shown that for small values of the parameter characterizing the energy input in the plasma, the amplification coefficients of a harmonic acoustic wave in the problem of propagation of the initial perturbation and in the problem with the boundary conditions are close. However, if the energy input increases, the amplification of the wave propagating from the source is larger than in the problem of the initial perturbation propagation. The same concerns the amplification of waves with different frequencies for fixed parameters of the plasma; i.e., the difference between the amplification coefficients is larger, the lower the wave frequency. The resultant analytic dependences make it possible to determine exactly which of the problems (with the initial or boundary conditions) should be solved to compute the amplification coefficient of acoustic waves under specific experimental conditions.

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“…On the other hand, in a number of experiments that studied propagation of sound in low-pressure cylindrical discharge tubes, amplification of sound waves has been observed [5][6][7][8]. The effect of sound amplification by glow discharge plasma was recently proposed as an enabling tool for stimulating precipitation in atmospheric clouds [9].…”

Section: Introductionmentioning

confidence: 99%

Propagation of sound in glow discharge plasma

Soukhomlinov¹,

Герасимов²,

Sheverev³

2007

J. Phys. D: Appl. Phys.

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Propagation of sound in a medium where the rate of local heat addition is a function of gas density is analysed theoretically and the results are applied for modelling the experimentally observed effect of amplification of acoustic waves by an extended glow discharge in air. The model adequately describes the experimental dependences of the gain on the wave frequency and discharge power density and predicts that the amplification of sound by an unconfined glow discharge in air increases with discharge current density but does not change noticeably with gas pressure when the current density is kept constant. Quantitative estimates indicate that a gain of as high as 1 m−1 (or 9 dB for a 60 dB wave passing through 1 m of plasma) could be realized using a discharge in air with a current density of 100 mA cm−2.

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On acoustic stimulation of atmospheric precipitation

Cited by 11 publications

References 6 publications

Statistic evaluation of low-frequency acoustic wave impact on rainfall stimulation

Statistic evaluation of low-frequency acoustic wave impact on rainfall stimulation

Propagation of acoustic waves in a medium with the Rayleigh energy release mechanism

Propagation of sound in glow discharge plasma

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