WO2019151558A1

WO2019151558A1 - Apparatus and method for evaluating soundness of fuel nozzle

Info

Publication number: WO2019151558A1
Application number: PCT/KR2018/001901
Authority: WO
Inventors: 서동균; 박세익; 주용진; 신주곤
Original assignee: 한국전력공사
Priority date: 2018-02-02
Filing date: 2018-02-13
Publication date: 2019-08-08
Also published as: KR102052258B1; KR20190093912A

Abstract

The present invention provides an apparatus and a method for evaluating soundness of a fuel nozzle. The apparatus for evaluating soundness of a fuel nozzle, which evaluates soundness of a fuel injection device having a plurality of fuel nozzles, comprises: an injection water supply unit for supplying injection water to each of a plurality of fuel nozzles; a plurality of measurement tubs corresponding to the fuel nozzles, respectively; a water level measuring module for measuring water level of each of the measurement tubs in which the injection water injected through the fuel nozzles is received; and a control unit for calculating a jet coefficient for each of the fuel nozzles on the basis of the water level measured by the water level measuring module, and recording and storing same to quantitatively evaluate a state of each of the fuel nozzles.

Description

Fuel nozzle soundness evaluation device and evaluation method

The present invention relates to an apparatus for evaluating soundness of fuel nozzles and an evaluation method thereof, and more particularly, to an apparatus for evaluating soundness of fuel nozzles for effectively performing hysteresis management for each fuel nozzle and an evaluation method thereof.

The gas turbine for power generation consists of a compressor, a combustor, and a turbine. The compressor compresses air to high pressure, and the high pressure air and fuel are injected and combusted in the combustor. The high temperature and high pressure combustion gas generated at this time rotates the turbine to produce electricity. The combustor is provided with a plurality of fuel nozzles, and the fuel nozzle is provided with a plurality of injection holes.

For stable operation of the gas turbine combustor, it is necessary to identify whether the fuel nozzle is deformed or clogged, and ultimately evaluate the soundness so that fuel injection can be performed normally through cleaning or replacement. In particular, the clogging phenomenon of foreign substances in the fuel nozzle may cause instability of combustion due to fuel amount variation for each fuel nozzle hole, and thus vibration and backfire. In addition, when a foreign material is injected at a high speed with the fuel supplied at a high pressure, damage due to overheating and hitting of the material may occur, and may cause deformation of the nozzle hole.

In the case of performing the integrity evaluation of fuel nozzles at the site of a conventional power plant, it is common to dismantle the fuel nozzles in the event of an abnormal phenomenon and perform visual inspection only without a separate test device. There is a problem that can not be confirmed and simply judges the replacement.

Accordingly, according to the conventional method, it is difficult to quickly evaluate the inspection, repair, replacement, etc. of the fuel nozzle by quantitatively accurately evaluating the internal state of the new fuel nozzle or the nozzle to be evaluated.

Therefore, there is a need for an evaluation apparatus capable of quantitative evaluation for each fuel nozzle in order to determine the degree of improvement before and after cleaning in the combustor device and to manage the life history of the fuel nozzle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and quantitatively evaluates the state of fuel nozzles in a fuel injection device, such as a combustor of a gas turbine, and effectively manages the health of the fuel nozzles in the future. And its evaluation method.

Another object of the present invention is to provide an apparatus for evaluating the health of a fuel nozzle and a method for evaluating the same, which shorten the test time of a plurality of fuel nozzles.

In order to achieve the above object, an apparatus for evaluating the health of a fuel nozzle according to the present invention is an apparatus for evaluating the health of a fuel injection device including a plurality of fuel nozzles, wherein the apparatus for evaluating the health of a fuel nozzle includes: A water level measurement module including an injection water supply unit for supplying injection water, a plurality of measurement tanks corresponding to each of the fuel nozzles, and measuring a level of the measurement tank in which the injection water injected through the fuel nozzle is accommodated; And a control unit for calculating, recording, and storing an injection coefficient for each of the fuel nozzles based on the water level measured by the water level measurement module to quantitatively evaluate the state of the fuel nozzles.

According to another aspect of the present invention, there is provided a method for evaluating the health of a fuel nozzle, the method for evaluating the health of a fuel injection device including a plurality of fuel nozzles, wherein the injection water is supplied to each of the plurality of fuel nozzles. Calculating the injection coefficient for each of the fuel nozzles on the basis of a water supply step, a level measurement step of measuring the level of the injection water injected from the fuel nozzle and received in the measurement tank, and a level measured in the level measurement step An injection coefficient calculating step and an injection coefficient monitoring and recording step of quantitatively evaluating the state of the fuel nozzle by monitoring, recording, and storing the injection coefficient calculated in the injection coefficient calculating step for each of the fuel nozzles.

According to the fuel nozzle soundness evaluation device and the evaluation method according to the present invention, by quantitatively evaluating the state of the fuel nozzle in the fuel injection device, such as the combustor of the gas turbine, it provides the effect of effectively performing the history management for each fuel nozzle in the future can do.

In addition, according to the present invention, it is possible to evaluate each fuel nozzle individually and simultaneously, thereby reducing the test time.

Further, according to the present invention, the injection coefficient can be accurately measured by keeping the pressure of the injection water supplied to the fuel nozzle constant and stabilizing the water surface of the measuring tank.

1 is a block diagram schematically showing an apparatus for evaluating the health of a fuel nozzle and a fuel nozzle according to an embodiment of the present invention.

2 is a view showing a water level measurement module applied to the present invention.

Figure 3 is a perspective view showing a unit level measurement module applied to the present invention.

4 is a flowchart of a method for evaluating the health of a fuel nozzle according to the present invention.

FIG. 5 is data in real time measuring the water level before and after cleaning the fuel nozzle using the fuel nozzle health evaluation apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention according to the accompanying drawings will be described in detail.

First, the embodiments described below are suitable embodiments for understanding the technical features of the present invention and the health evaluation device of the fuel nozzle. However, the technical features of the present invention are not limited by the embodiments described or applied to the embodiments described below, and various modifications are possible within the technical scope of the present invention.

An apparatus for evaluating the health of a fuel nozzle according to the present invention is based on evaluating the health of a fuel injection device including a plurality of fuel nozzles. Here, the fuel injection value may be, but is not limited to, a combustor of a gas turbine.

Referring to FIG. 1, an apparatus 100 for assessing health of a fuel nozzle according to an embodiment of the present invention includes a spray water supply unit 200, a water level measurement module 300, and a controller 400.

The injection water supply unit 200 supplies injection water to a plurality of fuel nozzles, respectively. Specifically, the injection water supply unit 200 may supply the injection water supplied from the water supply source 210 to each fuel nozzle.

The water level measurement module 300 includes a plurality of measurement tanks 310 corresponding to the respective fuel nozzles, and measures the level of the measurement tank 310 in which the injection water injected through the fuel nozzles is accommodated.

Specifically, the measuring tank 310 is provided in the lower portion of the fuel nozzle and provided with a receiving space therein, can receive and accumulate the injection water injected from the fuel nozzle. The present invention can evaluate the state of the fuel nozzle by measuring the level of the injection water contained in the measuring tank (310).

The controller 400 calculates, records, and stores an injection coefficient for each fuel nozzle 10 based on the water level measured by the water level measurement module 300 to quantitatively evaluate the state of the fuel nozzle 10.

In detail, the control unit 400 may collect the water level information of the injection water accommodated in the measurement tank 310 from the water level measurement module 300, and calculate and quantify the injection coefficient of the fuel nozzle 10 based on this. For example, the water level measurement module 300 may measure the water level in real time through the water level meter 320 installed for each individual measuring tank 310, and the control unit 400 receives the real-time level value of the water, and receives The injection coefficient can be calculated from the level value and hydrodynamic theory.

In addition, the controller 400 may calculate the injection coefficient for each fuel nozzle 10 or calculate the injection coefficients before and after the cleaning of the fuel nozzle 10 to quantify the state of the fuel nozzle 10. In addition, the controller 400 monitors, records, and stores the injection coefficients of each of the numerical fuel nozzles 10, so that the internal state of each nozzle can be accurately evaluated and the history can be managed.

When the health assessment device 100 of the fuel nozzle according to the present invention is used as described above, the state of the fuel nozzle 10 is quantitatively evaluated in a fuel injection device such as a combustor of a gas turbine, and thus the history of each fuel nozzle 10 is made. It can provide the effect of effective management.

In detail, the injection water supply unit 200 may include a supply line 201 and a supply pump 230. In addition, the injection water supply unit 200 may further include a pressure adjusting member 250.

The supply line 201 may connect the fuel supply unit 10 and the water supply source 210 providing the injection water. The supply line 201 may be branched to the number of each fuel nozzle 10, and the branched branch line 202 may be connected to each nozzle. Accordingly, each fuel nozzle 10 may be separately supplied with the injection water.

The supply pump 230 may be provided on the supply line 201 to supply the injection water from the water supply source 210 to the supply line 201. That is, water may be supplied from the water supply source 210 to the supply line 201 by the pumping of the supply pump 230, and the water supplied to the fuel nozzle 10 through the supply line 201 may be a fuel nozzle ( It can be spray water through 10). At this time, the supply pump 230 may be provided to enable the pressure control to ensure a sufficient flow rate for the test.

The pressure regulating member 250 is provided on the supply line 201 at the rear end of the supply pump 230 to adjust the pressure of the injection water supplied to the fuel nozzle 10.

More specifically, the pressure regulating member 250 may include a pressure regulator 251, a first pressure gauge 252, and a second pressure gauge 253.

The pressure regulator 251 may be connected to the supply line 201 at the rear end of the supply pump 230, and the first pressure gauge 252 may be provided at the front end of the pressure regulator 251 to measure the pressure at the front end of the pressure regulator 251. The second pressure gauge 253 may be provided at the rear end of the pressure regulator 251 to measure the pressure at the rear end of the pressure regulator 251. The first pressure gauge 252 and the second pressure gauge 253 may be connected to the control unit 400.

The user may input a set pressure for evaluation to the pressure regulator 251, and the control unit 450 provided in the controller 400 receives a signal of the first pressure gauge 252 which is the primary pressure of the pressure regulator 251. After comparing with the set pressure, if the pressure difference occurs, the secondary pressure of the pressure regulator 251 can be adjusted by operating the pressure regulator 251. Accordingly, the pressure of the second pressure gauge 253 for measuring the pressure at the front end of the fuel nozzle 10 may be kept constant.

Therefore, the present invention can accurately calculate the injection coefficient of the fuel nozzle 10 by maintaining a constant pressure of the injection water supplied to the fuel nozzle 10 by the pressure regulating member 250.

Meanwhile, referring to FIGS. 1 and 2, the water level measurement module 300 may further include a connection member 330. The connecting member 330 may connect and fix the plurality of measuring tanks 310 to each other so that the plurality of measuring tanks 310 are fixed to the lower positions of the respective fuel nozzles 10.

Specifically, since the present invention includes individual measuring tanks 310 for each of the fuel nozzles 10 in order to evaluate the plurality of fuel nozzles 10 simultaneously, the size of the measuring tank 310 is reduced and the flow rate of the injected water is accommodated. As it decreases, the wave of the surface and the shaking of the measuring tank 310 may occur due to the injection. The connecting member 330 connects the plurality of measuring tanks 310 to fix the positions of the measuring tanks 310 and simultaneously move the plurality of measuring tanks 310, thereby causing waves and shaking due to the injection of the jetting water. Can be minimized. In addition, since the plurality of measuring tanks 310 are fixed to the connection member 330, the position of the measuring tank 310 may be fixed to the lower portion of the fuel nozzle 10.

Therefore, in the present invention, even when the plurality of fuel nozzles 10 are simultaneously measured, the water level of the injection water accommodated in the plurality of measuring tanks 310 can be accurately measured.

For example, the connection member 330 is coupled to the side of the plurality of measuring tanks 310 as shown in the embodiment, it may be provided detachably with the measuring tank (310).

Specifically, the connection member 330 may be coupled to the side of the measuring tank 310 and fixed. However, the present invention is not limited thereto, and the shape and the coupling position of the connection member 330 may be variously modified according to the shape and arrangement of the plurality of measuring tanks 310.

In addition, the connection member 330 may be provided detachably to the measuring tank (310). Accordingly, the installation and dismantling work at the power plant site where the combustor is installed can be facilitated.

Meanwhile, referring to the embodiment illustrated in FIG. 3, the water level measurement module 300 according to the present invention may include a water level meter 320. The water level meter 320 is provided in each measuring tank 310 individually, and can measure the water level of the injection water accommodated in the measuring tank 310.

Specifically, the measuring tank 310 may be provided with a projection 311 made of a transparent material on the side. Accordingly, the water level and the internal state of the measuring tank 310 can be visually confirmed. In addition, the water level meter 320 may be provided in the measuring tank 310 to measure the level of the sprayed water in real time. In addition, the water level gauge 320 may transmit the measured water level value to the controller 400. The controller 400 may calculate the water level increase rate by collecting the water level value over time.

Here, the type of the level gauge 320 is not limited, and if the level of the measuring tank 310 can be measured and transmitted to the control unit 400 in real time, various types of the level gauge 320 may be provided.

Meanwhile, the water level measurement module 300 may further include a sleep stabilization member 350. The sleep stabilizing member 350 may be provided to be in contact with the water surface of the spray water accommodated in the measuring tank 310, and may attenuate waves generated in the water surface by spraying the spray water.

In more detail, the injection water injected through the fuel nozzle 10 may generate surface waves while colliding with the surface of the injection water accumulated in the measurement tank 310. Due to this wave, the surface of the sprayed water of the measuring tank 310 may become unstable, which may cause difficulty in accurately measuring the water level by the water gauge 320.

The surface stabilizing member 350 may attenuate such surface waves while floating in contact with the surface of the sprayed water to stabilize the water level so that the water level may be accurately measured by the water level gauge 320.

In detail, the sleep stabilization member 350 may include a rotation shaft 351 and a stabilizer 352. The rotating shaft 351 is installed on the inner surface of the measuring tank 310 and may be provided to be moved up and down in accordance with the level of the injection water. The stabilizer 352 is installed on the rotating shaft 351 to be rotatable about the rotating shaft 351 and may contact the water surface of the sprayed water accommodated in the measuring tank 310.

More specifically, the end of the rotary shaft 351 is inserted into the guide groove 313 formed up and down on the inner surface of the measuring tank 310, can be guided by the guide groove 313 can move up and down. The rotating shaft 351 moves up and down according to the level of the sprayed water accumulated in the measuring tank 310. The stabilizer 352 may be rotatably installed on the rotation shaft 351 to be installed inside the measuring tank 310. The stabilizer 352 may stabilize the surface waves of the water while the bottom surface contacts the water surface and pivots about the rotation shaft 351 as the rotary shaft 351 moves up and down. The shape of the stabilizer 352 is not limited, and various shapes may be applied as long as the surface of the stabilizer 352 may be stabilized in contact with a predetermined area of the surface of the water.

For example, the stabilizer 352 may be disposed below the fuel nozzle 10 to directly collide with the injection water injected from the fuel nozzle 10 downward. Accordingly, since the sprayed water collides with the stabilizer 352 and accumulates in the measuring tank 310, the generation of surface waves can be minimized by avoiding direct collision of the sprayed water with the surface of the water. However, the shape and position of the stabilizer 352 is not limited to those described above and the drawings, and various modifications are possible as long as the surface wave can be stabilized in contact with the water surface.

The controller 400 may include a data collection unit 410, a calculation unit 430, a control unit 450, and a monitoring unit 460.

The data collection unit 410 may be connected to each of the water level meter 320 provided in the water level measurement module 300 to collect the water level information measured by the water level meter 320. The calculation unit 430 may calculate the water level increase speed and the injection coefficient through the collected water level information. The control unit 450 may be connected to the constant pressure 251, the first pressure gauge 252, and the second pressure gauge 253 to control the pressure of the injection water in front of the fuel nozzle 10. The monitoring unit 460 may monitor, record, and store the injection coefficient for each fuel nozzle 10. However, the configuration of the control unit 400 and the role of each configuration is not limited to the above description, and various controls may be performed if necessary for soundness evaluation.

On the other hand, the control unit 400 collects the water level information of each measuring tank 310 measured by the water level measurement module 300 in real time, calculates the increase rate of the water level by the collected water level information, Bernoulli's theorem The injection coefficient of each fuel nozzle 10 can be calculated by Equation 1 below. The role of the controller 400 may be performed by the calculation unit 430.

[Equation 1]

Here, C _noz is the injection coefficient in the fuel nozzle 10, P _noz (t) is the pressure value applied to the front end of the fuel nozzle 10, P _amb is the pressure applied to the measuring tank 310, A _Noz is The effective area of the fuel nozzle 10 to be injected, A _s (t) is the surface area of the water over time, dL (t) / dt is the rate of increase of the level of the measuring tank. Where P _amb can generally correspond to atmospheric pressure.

More specifically, the injection coefficient of each fuel nozzle 10 can be derived by the level value measured in real time by the individual measuring tank 310 and Bernoulli's theorem which is a hydrodynamic theory.

By Bernoulli's theorem, the flow rate Q (t) of the incompressible fluid injected from the fuel nozzle 10 can be expressed by Equation 2 below.

[Equation 2]

After the injection water is injected from the fuel nozzle 10, the mass according to the flow rate accumulated in the measuring tank 310 may be represented by Equation 3 according to the mass conservation law. In Equation 3, m _cv is the mass accumulated _in the measuring tank 310, m _in is the mass flowing into the measuring tank 310, m _out is the mass flowing _out of the measuring tank 310.

[Equation 3]

Since m _out is 0 because there is no flow rate flowing _out of the measuring tank 310 during the health evaluation, the equation 3 may be expressed by Equation 4 below, assuming that the accumulated injection water is a compressive fluid.

[Equation 4]

Substituting Equation 2 into Equation 4 and removing the density term ρ and the flow rate term Q, Equation 4 may be represented by Equation 5 below. In Equation 5, dL (t) / dt is a level increase rate calculated based on the measured water level.

[Equation 5]

As a result, when the injection coefficient is summarized through Equation 5, Equation 1 may be expressed.

Here, L1, which is the level of the measuring tank 310, is the lowest point of the height that can measure the water level, and L2 is the level of the water level where the surface area is constant because no obstacles occur during the test (see FIGS. 3 and 5). Since the surface area of L1 to L2 is constant, A _s (t) is assumed to be A _{s, 1} , and the rate of increase of water level is constant from L1 to L2, so dL (t) / dt is assumed to be (dL / dt) ₁ . , Equation 5 may be represented by Equation 6 below.

[Equation 6]

In summary, the injection coefficient in Equation 6 may be expressed as Equation 7 below.

[Equation 7]

The injection coefficient of each fuel nozzle 10 calculated as described above may be monitored / recorded / stored by the controller 400.

In addition, the injection water supply unit 200 supplies the injection water to a plurality of the fuel nozzle 10 at the same time, the water level measurement module 300 simultaneously measures the water level of the plurality of the measuring tank 310, The controller 400 may simultaneously calculate and record the injection coefficients of the fuel nozzles 10. Accordingly, the test time for health assessment can be shortened.

On the other hand, with reference to FIG. 4, the soundness evaluation method of the fuel nozzle according to another aspect of the present invention will be described. The method for evaluating the health of a fuel nozzle according to the present invention uses the above-described apparatus for evaluating the health of a fuel nozzle, and hereinafter, redundant description of the same configuration will be omitted.

The method for evaluating the health of the fuel nozzle according to the present invention includes a spray water supply step (S110), a water level measurement step (S120), an injection coefficient calculation step (S130), and an injection coefficient monitoring and recording step (S140). .

In the injection water supply step S110, injection water is supplied to the plurality of fuel nozzles 10, respectively.

Specifically, the injection water supply step (S110), the pump driving step (S111) for driving the supply pump 230 to supply the injection water from the water supply source 210 to the supply line 201 connected to the fuel nozzle 10 and The step of determining whether the deviation of the pressure of the injection water supplied and the set supply pressure is within the predetermined error range (S112), and when the deviation is out of the predetermined error range, the fuel nozzle 10 by the pressure adjusting member 250 It may include a pressure control step (S113) for adjusting the pressure of the injection water supplied to the front end of the.

Specifically, in the pressure adjusting step (S113), the set pressure input by the user is compared with the pressure of the first pressure gauge 252 at the front end of the pressure regulator 251 provided in the supply line 201, and the pressure deviation is determined. If it is out of the error range, the secondary pressure of the rear end of the constant pressure regulator 251 may be adjusted by operating the constant pressure regulator 251. Accordingly, the pressure of the second pressure gauge 253 for measuring the pressure at the front end of the fuel nozzle 10 may be kept constant.

In the level measurement step S120, the level of the injection water injected from the fuel nozzle 10 and accommodated in the measurement tank 310 is measured. At this time, the water level can be measured in real time through the water level meter 320 provided in the individual measuring tank (310).

The injection coefficient calculation step S130 calculates the injection coefficient for each fuel nozzle 10 based on the water level measured in the water level measurement step S120.

Specifically, the injection coefficient calculation step (S130), collecting the water level information of each measuring tank 310 measured in the water level measurement step (S120) in real time, and calculates the increase rate of the water level by the collected water level information The injection coefficient of each fuel nozzle 10 can be calculated by the above equation 1 based on Bernoulli's theorem.

The injection coefficient monitoring and recording step S140 monitors, records, and stores the injection coefficients calculated in the injection coefficient calculation step S130 for each fuel nozzle 10 to quantitatively evaluate the state of the fuel nozzle 10. do.

On the other hand, Figure 5 is a data measuring the water level of the measuring tank 310 according to the time of the unit fuel nozzle using the water level measurement module 300 according to the present invention. A line is a graph measuring the water level in the state before the cleaning of the fuel nozzle 10, B line is a graph measuring the water level in the state after the cleaning of the fuel nozzle 10. Here, the water level cannot be measured below L1. And, L2 is the position where the water level speed is changed by the obstacle.

The increase in water level can be obtained from the slope of the graph between L1 and L2, and this value can be substituted into Equation 7 to obtain the injection coefficients before and after the cleaning of the fuel nozzle 10. Referring to the graph and equation (7) of Figure 5 it can be seen that the injection coefficient of the fuel nozzle 10 after cleaning is larger than the injection coefficient of the fuel nozzle 10 before cleaning. In this way, the internal state of the fuel nozzle 10 can be quantitatively checked.

In addition, according to the present invention, it is possible to evaluate each fuel nozzle individually and simultaneously, thereby reducing the test time. In addition, the injection coefficient can be accurately measured by keeping the pressure of the injection water supplied to the fuel nozzle constant and stabilizing the surface of the measurement tank.

Although specific embodiments of the present invention have been described above, the spirit and scope of the present invention are not limited to these specific embodiments, and are described in the claims by those skilled in the art. Various modifications and variations are possible without departing from the spirit of the invention.

Claims

In the fuel nozzle soundness evaluation device for evaluating the health of the fuel injection device having a plurality of fuel nozzles,

An injection water supply unit supplying injection water to a plurality of the fuel nozzles, respectively;

A level measuring module including a plurality of measuring tanks corresponding to each of the fuel nozzles, and measuring a level of the measuring tank in which the injection water injected through the fuel nozzle is accommodated; And,

And a control unit for calculating, recording, and storing an injection coefficient for each of the fuel nozzles based on the water level measured by the water level measurement module, to quantitatively evaluate the state of the fuel nozzles.
The method of claim 1,

The injection water supply unit,

A supply line connecting the fuel nozzle with a water supply source for supplying injection water; And,

And a supply pump provided on the supply line to supply injection water from the water supply source to the supply line.
The method of claim 2,

The injection water supply unit further includes a pressure adjusting member provided on the supply line at the rear end of the supply pump to adjust the pressure of the injection water supplied to the fuel nozzle.
The method of claim 1,

The water level measurement module, which is provided separately in each of the measuring tank, further comprising a water level gauge for measuring the level of the injection water contained in the measuring tank, the fuel nozzle health evaluation device.
The method of claim 1,

The water level measurement module further includes a surface stabilization member provided to be in contact with the water surface of the injection water accommodated in the measurement tank to attenuate waves generated at the water surface by the injection of the injection water. .
The method of claim 5,

The sleep stabilizing member,

A rotating shaft installed on the inner surface of the measuring tank and provided to be movable up and down according to the level of the sprayed water; And,

And a stabilizer provided on the rotating shaft to be rotatable about the rotating shaft and in contact with the water surface of the injection water accommodated in the measuring tank.
The method of claim 1,

The water level measuring module further includes a connecting member for connecting and fixing the plurality of the measuring tanks to each other so that the plurality of the measuring tanks are fixed to the lower positions of the respective fuel nozzles.
The method of claim 7, wherein

The connecting member is coupled to the side of the plurality of the measuring tank in an annular shape, and provided with a detachable to the measuring tank, the fuel nozzle health evaluation device.
The method of claim 1,

The controller collects, in real time, the water level information of each of the measuring tanks measured by the water level measurement module, calculates an increase rate of the water level based on the collected water level information, and each of the following Equations 1 based on Bernoulli's theorem. A fuel nozzle health evaluation device for calculating an injection coefficient of the fuel nozzle.

[Equation 1]

(C noz is the injection coefficient in the fuel nozzle, P noz (t) is the pressure value applied to the front end of the fuel nozzle, P amb is the pressure applied to the measuring tank, A noz is the effective area of the fuel nozzle to be injected, A s (t) is the surface area over time, and dL (t) / dt is the rate of increase
The method of claim 1,

The injection water supply unit simultaneously supplies injection water to a plurality of the fuel nozzles, the level measurement module simultaneously measures the levels of the plurality of measurement tanks, and the control unit simultaneously calculates and records the injection coefficients of the plurality of fuel nozzles. A fuel nozzle soundness evaluation device.
In the fuel nozzle health evaluation method for evaluating the health of the fuel injection device having a plurality of fuel nozzles,

An injection water supply step of supplying injection water to each of the plurality of fuel nozzles;

A level measurement step of measuring the level of the injection water injected from the fuel nozzle and accommodated in the measurement tank;

An injection coefficient calculating step of calculating an injection coefficient for each of the fuel nozzles based on the water level measured in the water level measuring step; And,

And the injection coefficient monitoring and recording step of quantitatively evaluating the state of the fuel nozzle by monitoring, recording, and storing the injection coefficient calculated in the injection coefficient calculation step for each of the fuel nozzles.
The method of claim 11,

The injection water supply step,

A pump driving step of driving a supply pump to supply injection water from a water supply source to a supply line connected to the fuel nozzle;

Determining whether a deviation between the pressure of the injection water supplied and the set supply pressure is within a predetermined error range; And,

And a pressure adjusting step of adjusting the pressure of the injection water supplied to the front end of the fuel nozzle by the pressure adjusting member when the deviation is out of a predetermined error range.
The method of claim 11,

The level measurement step, the fuel nozzle health evaluation method for measuring in real time the level of the injection water received in the measuring tank through a water level meter provided in each of the measuring tank.
The method of claim 11,

The step of calculating the injection coefficient, the water level information of each measuring tank measured in the water level measurement step in real time, calculates the rate of increase of the water level by the collected water level information, to the following equation 1 based on Bernoulli's theorem A method of evaluating the health of a fuel nozzle, wherein the injection coefficient of each fuel nozzle is calculated.

[Equation 1]

(C noz is the injection coefficient in the fuel nozzle, P noz (t) is the pressure value applied to the front end of the fuel nozzle, P amb is the pressure applied to the measuring tank, A noz is the effective area of the fuel nozzle being injected, A s (t) is the surface area over time, and dL (t) / dt is the rate of increase