Performance quantification method for tunnel fluid smoke barrier with centralized longitudinal ventilation

Abstract

The invention provides a performance quantification method for tunnel fluid smoke barrier with centralized longitudinal ventilation, which is characterized by comprising the following steps: step 1),determining an Euler number for measuring fluid smoke barrier performance, the Euler numbers being the ratio of equivalent pressure to inertia force, i.e., N, ventilator combined power consumption, i.e., arithmetic sum of power consumption of each single machine under a specific combination, and unit W; hSP is static pressure of a flue gas pollution-free channel, and the unit is Pa; QRC is the amount of air flow pressed into the flue gas pollution-free channel and has the unit being m < 3 > / s; 0.5 is a constant based on a hydrodynamic principle and is a dimensionless natural number; rho is theairflow density, and the unit is kg / m < 3 >; vRC is the air speed of a flue gas pollution-free channel, and the unit is m / s; Qp is the sum of the air volume of the pressed-in airflow, and the unit ism < 3 > / s. According to the performance quantification method for the tunnel fluid smoke barrier wall with the centralized longitudinal ventilation, a ventilation and smoke exhaust system and efficiency can be accurately and clearly quantified in a numerical mode.

Description

technical field [0001] The invention relates to the technical field of tunnel smoke exhaust, in particular to a method for quantifying the performance of a tunnel fluid smoke retaining wall with concentrated longitudinal ventilation. Background technique [0002] In recent years, with the development of social economy, urban ground transportation has become more and more congested. In order to meet the travel demand and alleviate the pressure of ground transportation, my country's underground transportation industry has developed rapidly. While it brings convenience, many problems that cannot be ignored have also emerged one by one; and the problem of underwater tunnel fires is the most prominent. According to statistics, 85% of victims died of inhalation of high temperature and toxic fumes. Therefore, ventilation and smoke exhaust methods, smoke exhaust effects and fan combination methods are still frontier issues in the industry. [0003] At present, the commonly used ve...

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Problems solved by technology

[0004] The underwater interval tunnel is different from ordinary tunnels. If longitudinal ventilation and smoke exhaust are considered, the geographical conditions make it difficult to arrange shafts. In addition, the effect of horizontal and semi-horizontal ventilation and smoke exhaust is excellent. However, the project cost is too high and construction management is difficult.

Naturally, the longitudinal ventilation centralized smoke exhaust method has gradually become the preferred ventilation and smoke exhaust method for underwater tunnels; however, the quantitative method for the performance of the fluid smoke barrier in the longitudinal ventilation centralized smoke exhaust method has not yet been formed, and it is impossible to predict a reasonable fan. Combined arrangement and ventilation effect

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