CN110853451A - An experimental device for simulating the fire behavior of ship deck pools with different inclination angles - Google Patents

Abstract

The invention discloses an experimental device for simulating the fire behavior of ship deck pools with different inclination angles, especially relates to the situation of deck fire when the ship is inclined due to external conditions such as sea wind and waves or collision accidents. It includes variable angle tilt support system, fire source system and supporting data acquisition system, which can simulate the fire scene of ship deck under different tilt angles. The present invention adjusts the inclination angle of the device through the rotating shaft structure, and the overall structure is simple, reliable and easy to operate. On the basis of predecessors, it overcomes the characteristics of high cost of full-scale experiments and inaccurate numerical simulation tools, and ensures the repeatability of experiments. It has great application value and guiding significance.

Description

An experimental device for simulating the fire behavior of ship deck pools with different inclination angles

technical field

The invention relates to the technical field of fire safety, in particular to an experimental device for simulating the fire behavior of ship deck pools with different inclination angles, which is used to simulate and study the fire behavior of ship deck pools under different inclination angles.

Background technique

During the process of sailing at sea, the ship will inevitably encounter severe weather with strong wind and waves or the situation of hitting the reef, which will cause the hull to heel or trim. If a fire occurs on the deck of the ship in this inclined state, it will not behave the same as a deck pool fire when the ship is stationary.

A lot of in-depth studies have been done on the oil pool fire in which the oil pool remains horizontal in an open environment, whether it is the fuel combustion characteristics or the flame shape characteristics. For the combustion characteristics, the research is mostly about the combustion rate of the fuel, the axial temperature, radiation and entrainment characteristics of the flame; as for the flame shape characteristics, the research is mostly about the flame height and flame pulsation characteristics. Tao Chang's method studied the burning rate of fuel with different thicknesses in the oil pan, and found that the burning rate increased first and then decreased with the increase of fuel thickness. Hamins studied the thermal feedback mechanism of the pool fire flame to the fuel surface, and found that the dominant factors of the thermal feedback were different for different sizes of oil pans. Zhou Kuibin proposed a model for predicting flame radiation based on the characteristics of flame morphology.

However, in the process of sailing at sea, the hull will inevitably be tilted, but there is little research on the deck oil pool fire under the tilted state. The previous experimental data cannot fully explain and analyze the oil pool fire behavior in the inclined state, and it is not easy to carry out a full-scale fire experiment, which requires the mobilization of a lot of manpower, material and financial resources. Therefore, small-scale experimental research that satisfies the similarity theory can better simulate the fire behavior of ship deck pools with different inclination angles. At the same time, small-scale experiments have the advantages of easy manipulation, good reproducibility, and high reliability of measurement results.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an experimental device for simulating the fire behavior of ship deck pools with different inclination angles, in order to fully study the fire behavior of oil pool fires under different inclination angles on the laboratory scale.

The present invention adopts the following technical solutions:

An experimental device for simulating fire behavior of ship deck pools with different inclination angles, comprising a variable-angle inclined support system, a fire source system and a supporting data acquisition system; wherein:

The variable-angle inclined support system includes a bottom support frame, a rotating shaft structure and a simulated deck, wherein: the rotating shaft structure is used to change the inclined angle of the simulated deck; the simulated deck has an array of openings, and is equipped with Fixed the stopper for placing the oil pan on the mock deck.

The fire source system includes an oil pan and liquid fuel placed in the oil pan.

The data acquisition system includes a weighing balance placed under the variable-angle inclined support system, and a camera placed on one side, wherein: the weighing balance is used for real-time recording of fuel quality changes in the oil pan during the combustion process; The camera is used to record the pool fire behavior in real-time under simulated deck tilt conditions.

Wherein, the main body of the bottom plate support frame is a rectangular steel plate.

Wherein, the rotating shaft structure can change the angle longitudinally, the maximum adjustment angle can reach 30°, and the precision is 0.1°.

Wherein, the simulated deck is a steel plate with array-type openings, and is equipped with a limiter for fixing the oil pan placed on the simulated deck.

Wherein, the shape of the oil pan is variable, and the height of the wall surface of the oil pan is adjustable.

Wherein, the type of the liquid fuel can be replaced, such as aviation kerosene, diesel, heptane, alcohol and other fuels.

The advantages and positive effects of the present invention are:

1. The present invention changes the inclination angle of the simulated deck through the rotating shaft structure, and the structure is simple and reliable.

2. The present invention has an array of openings on the simulated deck, and is equipped with limiters for fixing oil pans of different shapes and sizes.

3. The present invention directly adopts the pool fire as the fire source, which can simulate the behavior of deck pool fire under real fire conditions.

4. Compared with the large-scale experimental platform, the present invention has less consumption, strong repeatability, and convenient operation, which is beneficial to scientific research.

Description of drawings

1 is a schematic diagram of the overall structure of the experimental device for simulating the fire behavior of ship decks with different inclination angles according to the present invention;

2 is a schematic side view of the variable-angle inclined support system, the oil pan and the weighing balance of the experimental device for simulating the fire behavior of ship decks with different inclination angles according to the present invention;

FIG. 3 is a schematic diagram of the array-type openings on the simulated deck of the experimental device for simulating the fire behavior of ship decks with different inclination angles according to the present invention.

Labels in the figure: 1-bottom support frame; 2-rotating shaft structure; 3-simulation deck; 4-array type opening; 5-limiter; 6-oil pan; 7-weighing balance; 8-camera.

Detailed ways

Below in conjunction with the accompanying drawings, the present invention will be further described through embodiments.

Referring to FIG. 1 , the experimental device for simulating the fire behavior of ship decks with different inclination angles in this embodiment includes a variable-angle inclined support system, a fire source system, and a supporting data acquisition system.

Referring to FIG. 1 , the variable-angle inclined support system includes a bottom support frame 1 , a rotating shaft structure 2 and a simulated deck 3 . The rotating shaft structure 2 is connected with the simulated deck 3, and one end of the simulated deck 3 is fixed on the bottom support frame 1 by the rotating shaft. The dummy deck 3 has an array of openings 4, and is equipped with a stopper 5 for fixing the oil pan 6 placed on the dummy deck. A weighing balance 7 is placed at the bottom of the device for real-time recording of the mass change of the fuel in the oil pan 6 during the combustion process. A camera 8 is placed on one side of the device to record the flame image in the experiment.

Referring to FIG. 2 , the rotation axis structure 2 can change the inclination angle of the simulated deck 3 up to 30°, and the rotation axis structure 2 is marked with the inclination angle value.

Referring to Figure 3, the simulation deck 3 has an array of openings 4, which can be used with limiters 5 to fix oil pans of various shapes.

Referring to Fig. 1, in the experimental preparation stage, adjust the rotating shaft structure 2 to the required inclination angle. An oil pan 6 is placed on the dummy deck 3 , and the oil pan 6 is fixed by the stopper 5 , and then fuel is poured into the oil pan 6 . At the beginning of the experiment, the weighing balance 7 and the camera and the data acquisition system are activated, and then the fuel in the fuel pan 6 is ignited by the ignition device. After ignition, the weighing balance 7 records the mass change of the fuel in real time, and the camera 8 records the fire behavior in real time.

The parts of the present invention that are not described in detail belong to the well-known techniques in the art.

Claims (6)

1. The utility model provides an experimental apparatus of ship deck pond fire action of different inclination of simulation, its characterized in that: the experimental device comprises: the device comprises a variable-angle inclined supporting system, a fire source system and a matched data acquisition system; wherein:

variable angle inclined support system, including bottom sprag frame, pivot structure and simulation deck, wherein: the rotating shaft structure is used for changing the inclination angle of the simulation deck; the simulation deck is provided with an array type opening and is provided with a stopper for fixing an oil pan placed on the simulation deck;

the fire source system comprises an oil pan and liquid fuel placed in the oil pan;

the data acquisition system comprises a weighing balance placed below the variable-angle inclined support system and a camera placed on one side, wherein: the weighing balance is used for recording the mass change of the fuel in an oil pan in the combustion process in real time; the camera is used for recording pool fire behaviors under the condition of simulating deck inclination in real time.

2. The experimental device for simulating deck fire behaviors of ships at different inclination angles according to claim 1, is characterized in that: the bottom plate support frame main part is a rectangular steel plate.

3. The experimental device for simulating deck fire behaviors of ships at different inclination angles according to claim 1, is characterized in that: the rotating shaft structure can longitudinally change the angle, the maximum adjusting angle can reach 30 degrees, and the precision is 0.1 degree.

4. The experimental device for simulating deck fire behaviors of ships at different inclination angles according to claim 1, is characterized in that: the simulation deck is a steel plate, the plate is provided with array-type openings, and a stopper used for fixing an oil pan placed on the simulation deck is arranged on the plate.

5. The experimental device for simulating deck fire behaviors of ships at different inclination angles according to claim 1, is characterized in that: the oil pan is variable in shape and adjustable in height of the wall surface of the oil pan.

6. The experimental device for simulating deck fire behaviors of ships at different inclination angles according to claim 1, is characterized in that: the liquid fuel is replaceable in type, and specifically is aviation kerosene, diesel oil, heptane and alcohol fuel.

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