Experimental and Computational Study of Infrared Emission from Underexpanded Rocket Exhaust Plumes

Avital, G.; Cohen, Yoram; Gamss, L.; Kanelbaum, Y.; Macales, J.; Trieman, B.; Yaniv, Sara; Lev, M.; Stricker, J.N.M.; Sternlieb, A.

doi:10.2514/2.6629

Cited by 56 publications

(20 citation statements)

References 4 publications

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“…High altitude plume radiates more IR signature than at sea level; because for same nozzle exit conditions, high altitude plumes are bigger than the plume at sea level [87]. Avital et al [88] developed computer code INFRAD for prediction of rocket plume radiative characteristics. The code results were compared with the experimental measurements on under-expanded exhaust plume generated by solid-propellant Ballistic Evaluation Motor (BEM).…”

Section: Analysis Of Plume Ir Signaturementioning

confidence: 99%

Infrared signature studies of aerospace vehicles

Mahulikar

Sonawane

Rao

2007

Progress in Aerospace Sciences

293

111

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Infrared (IR) emissions from aircraft are used to detect, track, and lock-on to the target. MAN Portable Air Defence Systems (MANPADS) have emerged as a major cause of aircraft and helicopter loss. Therefore, IR signature studies are important to counter this threat for survivability enhancement, and are an important aspect of stealth technology. This paper reviews contemporary developments in this discipline, with particular emphasis on IR signature prediction from aerospace vehicles. The role of atmosphere in IR signature analysis, and relation between IR signature level and target susceptibility are illustrated. Also, IR signature suppression systems and countermeasure techniques are discussed, to highlight their effectiveness and implications in terms of penalties.

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Section: Analysis Of Plume Ir Signaturementioning

confidence: 99%

Infrared signature studies of aerospace vehicles

Mahulikar

Sonawane

Rao

2007

Progress in Aerospace Sciences

293

111

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“…where the Reynolds-stress expressions are given in Equation (5). The term G that represents the correlations between the velocity fluctuations and the mean pressure gradients, assimilated to an enthalpic production term, may induce an important negative contribution in regions of large density or pressure variations such as strong compression or expansion zones.…”

Section: Turbulence Modelingmentioning

confidence: 99%

“…Such jets are used in many applications, for instance to assist laser cutting [1], to drill by thermal spallation [2] or to improve surface coating by thermal sprays [3]. They are also the subject of some recent studies whose objectives, among others, are to reduce the screech noise [4] or the infrared signature in rocket exhaust plumes [5]. For higher values of NPR, the shock structure becomes more complex, as illustrated in Figure 1 (for NPR typically larger than 10).…”

Section: Introductionmentioning

confidence: 99%

A robust methodology for RANS simulations of highly underexpanded jets

Lehnasch

Bruel

2007

Numerical Methods in Fluids

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SUMMARYThis work aims at developing/combining numerical tools adapted to the simulation of the near field of highly underexpanded jets. An overview of the challenging numerical problems related to the complex shock/expansion structure encountered in these flows is given and an efficient and low-cost numerical strategy is proposed to overcome these, even on short computational domains. Based on common upwinding algorithms used on unstructured meshes in a mixed finite-volume/finite-element approach, it relies on an appropriate utilization of zonal anisotropic remeshing algorithms. This methodology is validated for the whole near field of cold air jets issuing from axisymmetric convergent nozzles and yielding various underexpansion ratios. In addition, the most usual corrections of the k-model used to take into account the compressibility effects on turbulence are precisely assessed.

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“…Nam et al [6] devised an infrared radiation modeling of NO, OH, CO, H 2 O, and CO 2 for emissivity prediction at high temperature. Avital et al [7] experimentally and computationally studied infrared radiation of rocket exhaust plumes. Snaza et al [8] modeled and investigated the effects of solid rocket motor propellant composition on plume infrared signature, considering that Al 2 O 3 particles are main infrared radiation source of solid rocket exhaust plumes.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Infrared Radiation Characteristics of the Diesel Engine Exhaust Plume by Infrared Imaging

Xu¹,

Du²,

Shen³

et al. 2016

IJCA

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The variation ranges of species concentration, temperature and particle concentration of exhaust plume of the diesel engine with different load rate were tested in this article. Based on prototype experiment, the simulated generator and experimental platform of exhaust plume were built, and the effects of temperature, CO2, vapor and carbon soot on the infrared radiation characteristics of the exhaust plume were experimentally studied by infrared imaging. Experimental results showed that the temperature of the exhaust plume was the most important influencing factor for the infrared radiation characteristics, and the CO2 and carbon soot were also important influence factors too. However, the effects of the vapor could be neglected because of the slight influence on the infrared radiation characteristics of the exhaust plume.

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Experimental and Computational Study of Infrared Emission from Underexpanded Rocket Exhaust Plumes

Cited by 56 publications

References 4 publications

Infrared signature studies of aerospace vehicles

Infrared signature studies of aerospace vehicles

A robust methodology for RANS simulations of highly underexpanded jets

Experimental Study on the Infrared Radiation Characteristics of the Diesel Engine Exhaust Plume by Infrared Imaging

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