Fire-fighting foam jet flow drop point strength calculation method based on multiple linear regression

Abstract

The invention discloses a fire-fighting foam jet flow drop point strength calculation method based on multiple linear regression, and relates to the field of fire-fighting foam jet flow. The method comprises the following steps: calculating section parameters by using structural parameters of the fire monitor, obtaining working pressure of the fire monitor, determining a calculation formula of initial jet velocity of fire-fighting foam at a muzzle according to a Bernoulli equation, and calculating the initial jet velocity of the fire-fighting foam at the muzzle according to the structural parameters of the fire monitor by using the relationship between flow and flow velocity and combining the working pressure of the fire monitor. Calculating the initial speed of the fire-fighting foam jet flow at the muzzle, calculating the drop point strength of the fire-fighting foam jet flow according to the flow of the fire-fighting foam jet flow and the actual drop point area, and calculating the fire-fighting foam jet flow drop point strength by nondimensionalizing the inclination angle of the fire-fighting monitor, the working pressure, the initial speed of the fire-fighting foam jet flow at the muzzle and the actual drop point strength. Establishing a fire-fighting foam jet flow drop point strength calculation formula based on a multiple linear regression method, and verifying the accuracy of the formula; quantitative calculation of the fire-fighting foam jet flow drop point strength is achieved, and accurate layout of fire-fighting tactics is facilitated.

Description

technical field [0001] The invention belongs to the field of fire-fighting foam monitors, in particular to a method for calculating the intensity of fire-fighting foam jets falling point based on multiple linear regression. Background technique [0002] As one of the most widely used fire-fighting equipment in actual fire fighting, fire monitor can implement long-distance fire-extinguishing and cooling protection in safe areas other than fire-field heat radiation, explosion danger, and toxic smoke areas. It has the characteristics of high fire-fighting efficiency and great power. , has become an essential equipment in mobile fire fighting equipment such as fire trucks and fire boats. Petrochemical fires are characterized by intense combustion, large radiant heat, and inaccessibility to firefighters. Therefore, fire cannons can be seen everywhere in key petrochemical dangerous places. Fire monitors play an irreplaceable role in regional fire fighting in petrochemicals, airpo...

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Problems solved by technology

[0004] However, at present, there are few relevant literatures on the quantitative calculation of the strength of the fire-fighting foam jet landing point, and most of them focus on the research on the trajectory of the fire-fighting foam jet. For example, Yao Bin, Shu Ya et al. However, the experimental design for the jet intensity test of the fire foam cannon was not disclosed; Hu Cheng et al. combined theoretical research with experimental testing methods to derive the compressed air foam jet trajectory equation, but did not No in-depth research has been conducted on the method for predicting the strength of the foam jet drop point of fire monitors

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