JP4346830B2 - Fluid measuring device and fluid measuring method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluid measuring device and a fluid measuring method.
[0002]
[Prior art]
Conventionally, the probe 100 disclosed in FIG. 11 is known as a technique for measuring the flow velocity and pressure of a fluid flow. This technique measures the pressure P [Pa] received by the pressure receiving surface 2a of the pressure sensor 2 by rotating the probe 100 mounted substantially at right angles to the fluid flow by a predetermined angle about the axis 100a. ), A pressure distribution curve S of the pressure P received by the pressure sensor 2 with respect to the rotation angle θ can be obtained. In addition, pressure distribution characteristics are prepared in advance using the angle θ when the fluid measurement probe is rotated by a predetermined angle about the columnar axis as a parameter, the static pressure Ps [Pa] is measured, and the pressure distribution curve S Is the total pressure Pz, and the total pressure Pz−static pressure Ps = dynamic pressure Pd can be calculated.
[0003]
[Problems to be solved by the invention]
However, in order to measure the total pressure, this conventional fluid measuring probe needs to measure the stagnation pressure of the surface directly facing the fluid flow, so that the length l of the pressure sensor 2 is parallel to the fluid flow direction. When the gap for inserting the fluid measurement probe is narrow, it is necessary to bend and insert the probe as shown in the figure. There is a problem that it is difficult to measure in a narrow measurement space due to rotation.
[0004]
Therefore, it is conceivable to form the probe in a cylindrical shape as shown in FIG. In this technique, the probe 300 is disposed at right angles to the fluid flow direction, and the fluid pressure is detected from the narrow passage 301 through the passage 303. Therefore, even if the narrow path 301 is slightly inclined, the pressure of the fluid applied to the narrow path 301 is affected, and advanced techniques are required to accurately measure the pressure.
[0005]
That is, when the fluid is flowing around the central axis 300a of the probe 300 at an angle θ with respect to an arbitrary reference angle in the direction of arrow A, which is the vertical direction of the probe 300, the probe 300 is rotated to rotate the probe 300. When the pressure distribution around is measured, as shown in (c), the maximum pressure is obtained at the angle θ, and a curve S which is a symmetric pressure distribution with respect to the angle can be drawn. The dynamic pressure can be obtained from the difference between the static pressure Ps obtained in advance in the curve S and the total pressure Pz which is the maximum pressure, and the flow angle can be obtained from the direction of the maximum pressure, and the flow speed and direction can be known. it can.
[0006]
However, as shown in (a), even when the fluid flows at an angle β in the vertical direction, the pressure distribution is similar to the pressure distribution in the case of arrow A, and there is a problem that A and B cannot be distinguished.
[0007]
In view of the above-described circumstances, the present invention provides a fluid measurement device and method that can easily measure the pressure of a fluid in a narrow measurement space even in a flow field in which the flow velocity and the direction of flow change unsteadily. With the goal.
Another object of the present invention is to provide a fluid measuring device and method that can easily measure the fluid flow direction even if the fluid flow direction is inclined in the vertical direction with respect to the horizontal direction. .
Another object of the present invention is to provide a fluid measuring device and method capable of measuring an accurate pressure.
[0008]
[Means for Solving the Problems]
The present invention is a fluid measuring device which is formed in a columnar body and measures the fluid by arranging the extending direction of the columnar body in the fluid circulation passage in a direction intersecting the fluid circulation direction.
The columnar body is disposed so as to be rotatable by a predetermined angle about a columnar axis, and has a fluid intake opening that takes in the fluid facing the fluid flow direction on the outer periphery of the columnar body, and the fluid intake opening on the back side. A recessed portion having a rear side wall surface facing the fluid flow direction, the rear wall surface surface facing the fluid flow direction and facing the fluid flow direction, and the left and right sides from the most projected portion. It has an inclined surface that separates and flows the fluid downstream in the flow direction, and forms a stagnation space where the fluid fills in the concave portion where the fluid flows separately on both the left and right sides,
Among pressure-receiving surface of the pressure sensor to measure the fluid pressure between the該淀said fluid intake opening of the viewed space and the inner side wall surface of the upper and lower walls of the recess, or to be present in at least one wall surface It arrange | positions so that it may adjoin.
[0009]
Here, the “back side wall surface” means a wall surface disposed opposite to the fluid intake opening on the back side and a planar body having the same action as the wall surface, for example, the curved surface 1Ac in FIG. 3A, the surfaces 1Cc, 1Dc, and 1Ec of the surfaces 1Bd, 1Bc, (b), (c), and (d), the edge 10Ad of FIG. 4B, the 10Ad of FIG. 6A, and FIG. This includes the edges 11b and 12b, the surface 10Fd in FIG. 10C, 10Gd in FIG.
[0010]
In the present invention, with the back side wall surface facing the fluid flow direction, the most projecting portion facing the fluid flow and the inclined surfaces on both sides from the most projecting portion are symmetrical along the fluid flow direction. As a result, the fluid collided by the back wall surface forms a stagnation space in the recess, and the fluid in the stagnation space pushed by the subsequent fluid flows separately to the left and right with respect to the cylinder.
The portion used for measuring the fluid pressure has a stagnation space, and the pressure receiving surface of the pressure sensor is the concave portion so as to measure the fluid pressure between the fluid intake opening and the back side wall surface of the stagnation space. of the upper and lower wall surfaces are arranged to present in or close as present in at least one wall surface.
[0011]
Therefore, according to the present invention, since the concave portion is formed in the columnar body so as to face the fluid flow direction, the columnar body extending direction is disposed in the fluid circulation passage so as to intersect the fluid circulation direction. Since the fluid is measured by the stagnation space of the recess, the pressure of the fluid can be measured easily and accurately even in a narrow measurement space.
Moreover, even if the fluid pressure measuring surface is slightly inclined from the fluid flow direction due to the stagnation space, it is possible to measure an accurate pressure.
[0012]
Further, the one from the fluid intake opening of the extended by upper and lower walls to said inner side wall, provided with an opening in one wall surface which extends at least from the fluid intake opening on the inner side wall surface, the pressure receiving It is also an effective means of the present invention that a columnar pressure sensor having a surface on the one wall surface is disposed in the columnar body through the opening.
[0013]
According to this technical means, the pressure sensor has a pressure receiving surface on the one wall surface of the pressure sensor formed in a columnar shape, the pressure receiving surface faces the stagnation space, and the longitudinal direction of the sensor is formed in the fluid measuring device formed in the columnar body. Since the direction can be arranged upright on the fluid measuring device parallel to the axis, the outer periphery of the sensor can be arranged close to or in contact with the inner wall of the outer peripheral surface inside the columnar body of the fluid measuring device. It is possible to provide a small fluid measuring device capable of measuring even in a narrow measurement space.
[0014]
In addition, an opening is provided in the upper and lower wall surfaces extending from the fluid intake opening to the back side wall surface, and the pressure receiving surface extends from the fluid intake opening to the back wall surface side. It is also an effective means of the present invention that the columnar pressure sensors included in the columnar body are respectively disposed on the upper wall surface side and the lower wall surface side in the columnar body through the opening.
[0015]
According to such technical means, since the pressure sensors are respectively disposed on the upper wall surface side and the lower wall surface side in the columnar body with the pressure receiving surface facing the stagnation space, the columnar shape forming the fluid measuring device The fluid pressure from the direction orthogonal to the axial direction of the body is the same pressure acting on the upper wall surface side and the lower wall surface side, but when the fluid flows at an angle from this orthogonal direction, the fluid flows The pressure on the facing side increases and the pressure on the other side decreases. Therefore, by storing the relationship as data in the apparatus in advance, by obtaining the pressure on the surface facing the direction in which the fluid flows and the pressure on the other surface at that time, the fluid at that time can be obtained. The direction of flow can be measured.
[0016]
Further, the invention relates to a fluid measurement method, using said fluid measuring device Te fluid measurement method odor measuring fluid, previously, the pressure distribution for an angle θ at which a predetermined angle rotates about the cylindrical axis of the columnar body providing a characteristic, pre-Symbol to measure the fluid pressure of a predetermined angle rotation and while the stagnation space around the columnar axis, measures the total pressure, static pressure and flow rate of the fluid based on the peak value of the fluid pressure It is characterized by that.
[0017]
According to the present invention, a fluid intake opening provided in the fluid measurement probe and a concave portion where the fluid measurement probe formed in a columnar shape is divided into left and right portions are filled with fluid to form a stagnation space. Since the stagnation space exists even if the back side wall surface is not disposed at a right angle so as to oppose the fluid flow direction accurately, the fluid pressure in the stagnation space is accurately measured. Can do.
[0018]
In another method invention, in the fluid measurement method for measuring a fluid using the fluid measurement device, the angle θ when rotating a predetermined angle around the columnar axis of the columnar body in advance as a parameter, A pressure distribution characteristic is prepared by a pair of fluid pressure measuring means arranged on the upper wall surface side and the lower wall surface side in which the fluid flow direction with respect to the fluid intake opening is changed by an angle β in the axial direction, and the columnar shape of the columnar body Measure the fluid pressure by the pair of fluid pressure measuring means in the stagnation space at the angle θ around the axis, and based on the fluid pressure value, in addition to the fluid total pressure, static pressure, flow angle θ, The angle β is measured.
[0019]
In the present invention, the fluid measurement probe is provided so as to face one side wall surface extending from the fluid intake opening of the recess forming the stagnation space toward the back side wall surface, and facing the one side wall surface. A pair of fluid pressure measuring means are arranged on each other side wall surface,
Fluid in which the flow direction of the fluid with respect to the fluid intake opening is orthogonal to the columnar axis by using the fluid measurement probe as a parameter and the angle θ when rotated by a predetermined angle around the columnar axis. When the flow direction is set to 0, a pressure distribution characteristic by the pair of fluid pressure measuring means changed by an angle β in the axial direction is prepared,
The fluid measuring probe measures the fluid pressure by the pair of fluid pressure measuring means in the stagnation space at the angle θ around the columnar axis, and based on the fluid pressure value, the total pressure of the fluid, the static pressure In addition, the flow angle θ of the fluid can be measured by measuring the angle β.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Only.
[0021]
Fig.1 (a) is the schematic of the fluid measuring device concerning 1st Embodiment of this invention, (b) is AA sectional drawing of (a). The same members as those in FIG.
In FIG. 1, the probe 1A formed in a columnar shape is provided with a recess 1Aa. The recess 1Aa is formed in a crescent shape symmetrically in the vertical direction of the center line 20 as shown in FIG.
[0022]
As shown in FIG. 2, the pressure receiving surface 2a of the pressure sensor 2 is disposed on the upper surface of the recess 1Aa. The pressure receiving surface 2a is partially missing without facing the recess 1Aa. However, depending on the pressure receiving performance of the pressure sensor 2, the pressure receiving surface 2a may face the front surface or may be partially missing. Good. The cylinder surface of the pressure sensor 2 should be as close as possible to the outer peripheral surface 4Ab of the support column 4A. With such a configuration, the outer periphery 4Ab of the support column 4A can be formed in a small diameter, which is compact and advantageous for measurement in a narrow measurement space, and the outer periphery surface 4Ab of the support column 4A and the back side of the recess 1Aa The distance to the wall surface 1Ac is shortened, and errors due to pressure fluctuations received by the pressure receiving surface 2a due to vibrations generated by the natural frequency of the upper and lower wall surfaces in the recess 1Aa of the probe 1A generated by the fluid can be reduced.
[0023]
The wall 1Ac on the back side of the recess 1Aa according to the present embodiment causes fluid stagnation in the recess 1Aa due to its presence. If the wall surface 1Ac is not present, the fluid flows in the direction of the arrow, and the pressure sensor 2 measures the static pressure. By this stagnation, the pressure sensor 2 can measure the total pressure.
[0024]
Due to this stagnation, even if the arrow direction slightly fluctuates up and down in FIG. 2 (a) or slightly in the rotation direction in FIG. The rate is small. Therefore, whether or not the probe 1A is arranged in a state as shown in FIG. 2A is arranged at a right angle to the flow direction is determined by rotating the column 4 in a clockwise or counterclockwise direction. It can be known by measuring the pressure and obtaining its peak value.
[0025]
Further, as shown in FIG. 2B, the back side wall surface 1Ac of the recess 1 </ b> Aa is curved toward the fluid flow direction symmetrically with respect to the center line 20. Therefore, the fluid is not reflected in the counter-flow direction by the wall surface 1Ac, the stagnation of the fluid in the recess 1Aa is not disturbed , and the total pressure is reduced by the pressure receiving surface 2a existing on the upper surface of the recess 1Aa. Measurement is possible.
[0026]
FIG. 3 shows another shape (4B, 4C, 4D, 4E) of the support 4. FIG. 3A shows a cylindrical column, a wall surface 1Bd that is orthogonal to the center line 20 and faces the fluid flow direction, and is symmetrical with respect to the center line 20 toward the fluid flow direction. 1Bc and 1Bc are curved. Since the wall surface 1Bd has a small area and the amount of fluid reflected in the counterflow direction by the wall surface 1Bd is small, the stagnation of the fluid in the recess 1Aa is not disturbed, and the total pressure can be measured.
[0027]
3B is thin in the direction perpendicular to the fluid flow direction and thick in the flow direction. Therefore, when it is placed in the fluid, the pillar itself is moved in the fluid flow direction by the fluid. The position of the sensor pressure-receiving surface is not shifted due to inclination or curvature, and an accurate pressure can be measured.
[0028]
The support column in FIG. 3C is formed in a quadrangular cross section, and the support column in FIG. 3D is formed in a triangular cross section. These recess back side wall surfaces 1Dc and 1Ec are curved symmetrically with respect to the center line 20 in the fluid flow direction. Since the amount of fluid reflected in the counterflow direction by the wall surface 1Dc and the wall surface 1Ec is small, the stagnation of the fluid in the recess 1Aa is not disturbed, and the total pressure can be measured.
[0029]
Next, the operation of the first embodiment configured as described above will be described with reference to FIG. In FIG. 2, the probe 1A arranged substantially perpendicular to the fluid flow is rotated by a predetermined angle about its axis 4Aa, and the pressure P [Pa] received by the pressure receiving surface 2a of the pressure sensor 2 is measured. ), A pressure distribution curve S of the pressure P received by the pressure sensor 2 with respect to the rotation angle θ can be obtained. At that time, the static pressure Ps [Pa] is measured from the pressure distribution characteristic of the angle θ when the fluid measurement probe prepared in advance is rotated by a predetermined angle around the columnar axis, and the peak of the pressure distribution curve S is measured. The value is the total pressure Pz, and the total pressure Pz−static pressure Ps = dynamic pressure Pd can be calculated.
[0030]
Since the first embodiment is configured as described above, the sensor 2 for measuring pressure can be formed in a small cylindrical shape, and its central axis 2b can be provided parallel to the column 4A. Can be formed in a small diameter and can be inserted into a narrow space.
[0031]
Further, since the columnar sensor 2 can be inserted and disposed in the support column 4A along the axis in the support column 4A, the surface of the sensor 2 can be disposed in contact with or close to the inner peripheral surface of the outer peripheral surface 4Ab of the support column 4A. Therefore, the pressure receiving surface 2a of the sensor 2 can be disposed adjacent to the outer peripheral surface of the support column 4A, and the pressure distribution generated on the outer peripheral surface of the support column can be measured. Therefore, the sensor 2 having the same performance as the pressure measuring instrument having the same diameter as the support column 4A in advance. by keeping measuring the static pressure at a position corresponding to the outer peripheral surface of the outer peripheral struts arranged, it is possible to measure the pressure distribution close to the pressure distribution curve S ₀ around struts.
[0032]
Next, a second embodiment will be described. FIG. 4A is a schematic view of a fluid measuring device according to a second embodiment of the present invention, FIG. 4B is a side view of the recess 10Aa portion, and FIG. 4C is a front view of the recess 10Aa portion. The difference from the first embodiment is that, in the first embodiment, the sensor having the pressure-receiving surface facing the recess is arranged on the upper side of the recess, whereas the second embodiment is different from the sensor in the second embodiment. Is arranged on the upper side and the lower side of the recess, and the pressure is measured in consideration of the influence of the fluid pressure from the vertical direction.
[0033]
In FIG. 4, the probe 10A is provided with a recess 10Aa formed in a V-groove shape, an opening 13 is formed on the upper side surface 10Ab, and an opening 14 is formed on the lower side surface 10Ac. The pressure receiving surface of the sensor 2 is formed in these openings. It arrange | positions so that it may oppose. The shape of the boundary line 10Ad between the upper side surface 10Ab and the lower side surface 10Ac is the inner wall surface 1Ac in FIG. 2 described in the first embodiment, 1Bd, 1Bc in FIG. 3A, and FIG. 3B. The same shape as 1Cc, 1Dc in FIG. 3 (c), and 1Ec in FIG. 3 (d) can be used.
[0034]
Next, the operation of the second embodiment will be described with reference to FIGS. When the fluid flows in the direction of the arrow at an angle β as shown in FIG. 5A and flows in the direction of the arrow at the angle θ as shown in FIG. the sensor pressure P ₁ parts 13 side is smaller than the sensor pressure P ₂ of the opening 14 side, when rotating the probe 10A in the clockwise direction from the angle theta = 0 ° as shown in FIG. 6 (b), (b) The pressure fluctuation curve 201 is drawn using the fluid pressure measured by the sensor on the opening 13 side, and the pressure fluctuation curve 202 is drawn using the fluid pressure measured by the sensor on the opening 14 side.
[0035]
On the other hand, if the angle β is 0 ° and the fluid flow direction is in the direction of the center line 30, the detected pressure of the sensor on the opening 13 side and the detected pressure of the sensor on the opening 14 side are equal to _Pn . When the fluid flow direction angle β changes clockwise from β = 0 ° as a starting point, the pressure fluctuation curve 204 due to the pressure detected by the sensor on the opening 14 side rises from the pressure P _n point, and the opening 14 Descends with a peak at an angle that directly faces the direction in which the fluid flows. Further, the pressure fluctuation curve 203 due to the pressure detected by the sensor on the opening 13 side falls from the pressure _Pn point.
[0036]
Then, at the predetermined β angle, the pressure P _2x is measured in the pressure fluctuation curve 204 and the pressure P _1x is measured in the pressure fluctuation curve 203. The fluid flow angle can be measured by measuring in advance the relationship between the β angle in the vertical direction in the fluid flow direction, that is, the values detected by the pair of sensors 2a and 2B with respect to the β angle. The measured pressure = P _n in the flow angle beta = 0 ° as a peak value, can be calculated as the total pressure P _z, dynamic pressure and a static pressure P _s and the total pressure P _z measured in advance Can be requested.
[0037]
Further, after adjusting the insertion angle of the probe 10A from the flow angle β and adjusting the measurement pressures of the sensors 2A and 2B to the same angle β, the total pressure, dynamic pressure, fluid velocity, and the like can be measured.
[0038]
7 and 8 are schematic views of a fluid measuring device according to a third embodiment of the present invention, in which FIG. 7 (a) is a side view, (b) is a front view, and FIG. 8 (a) is FIG. It is II sectional drawing of (a), FIG.8 (b) is II-II sectional drawing of FIG.7 (b). The difference from the second embodiment is that the stagnation space by the V-groove of the second embodiment is formed along the outer periphery of the support column in a direction perpendicular to the axis and parallel to the direction of fluid flow, so that the fluid escape of the stagnation space The third embodiment is formed in parallel with the fluid flow direction, whereas in the third embodiment, the two groove portions are cut and formed on the outer periphery of the support column at an angle with respect to the shaft center. In contact with each other to form a stagnation space by the V-groove, and the escaping portion of the stagnation space is formed at a vertical angle with respect to the direction of fluid flow along the two groove portions to form a fluid escaping portion. is there.
[0039]
The third embodiment will be described with reference to FIGS. 7 and 8. The upper edge 11a of the inclined surface 11 forming the upper groove portion is on the outer peripheral surface of the probe 10B, and the upper edge 11a extends from the lower edge 11b to the lower edge 11b. The inclined surface 11 is formed. Similarly, the lower edge 12a of the inclined surface 12 forming the lower groove portion is on the outer peripheral surface of the probe 10B, and the inclined surface 12 is formed from the lower edge 12a toward the lower edge 12b. These inclined surfaces 11 and 12 can be cut by a milling blade having a predetermined inclined surface angle at the blade tip.
[0040]
The fluid pressure in the stagnation space 10Ba is measured by a pressure sensor (not shown) provided at a place where the passages 16 and 17 communicate with each other as shown in FIG. 8B as a reference example . As shown in FIG. 9, the pressure sensor may be configured as a probe 10C by arranging the sensors 2A and 2B in the vicinity of the stagnation space 10Ca.
[0041]
FIG. 10 is a cross-sectional view showing various stagnation space shapes applicable to the second embodiment shown in FIG. FIGS. 10A and 10B use the square recesses 10Da and 10Ea in the first embodiment shown in FIG. 2 instead of the V-groove. Further, (c) and (d) are such that the upper side surfaces 10Db and 10Eb and the lower side surfaces 10Dc and 10Ec of the rectangular recess are curved like the upper side surfaces 10Fb and 10Gb and the lower side surfaces 10Fc and 10Gc. Incidentally, (b) and (d) are reference examples, and the passages 16 and 17 communicate with a pressure sensor (not shown).
[0042]
【The invention's effect】
As described above in detail, the present invention is provided with a recess having an opening and a back side wall surface facing the fluid flow direction in the columnar body, and a fluid stagnation space is formed in the recess. Since the extending direction of the columnar body is arranged in the passage in a direction crossing the fluid flow direction, and the fluid is measured by the stagnation space of the recess, the fluid pressure can be easily and accurately applied in a narrow measurement space. Can be measured.
[Brief description of the drawings]
FIG. 1 is a schematic view of a fluid measuring device according to a first embodiment of the present invention, and (b) is a cross-sectional view taken along the line AA in (a).
FIG. 2 is an operation explanatory diagram of the first embodiment.
FIG. 3 is a cross-sectional view showing a cross-sectional shape of another fluid measurement probe.
FIG. 4 is a schematic diagram of a fluid measuring device according to a second embodiment of the present invention.
FIG. 5 is an operation explanatory diagram 1 of the second embodiment.
FIG. 6 is an operation explanatory diagram 2 of the second embodiment.
FIG. 7 is a schematic view of a fluid measuring device according to a third embodiment of the present invention.
8A is a cross-sectional view taken along the line II in FIG. 7, and FIG. 8B is a cross-sectional view taken along the line II-II in FIG.
FIG. 9 is a schematic cross-sectional configuration diagram according to a modification of the third embodiment of the present invention.
FIG. 10 is a schematic cross-sectional configuration diagram according to another embodiment.
FIG. 11 is a schematic configuration diagram of a fluid measurement probe according to a conventional example.
FIG. 12 is a schematic configuration diagram of a fluid measurement probe according to a prior development example.
[Explanation of symbols]
1A Probe for fluid measurement (fluid measurement device)
1Aa Concave part 1Ac Back side wall surface 1Ah Most protruding part 2 Pressure sensor (A, B)

Claims (5)

In a fluid measuring device that is formed in a columnar body and measures the fluid by arranging the extending direction of the columnar body in the fluid circulation passage in a direction intersecting the fluid circulation direction,
The columnar body is disposed so as to be rotatable by a predetermined angle about a columnar axis, and has a fluid intake opening that takes in the fluid facing the fluid flow direction on the outer periphery of the columnar body, and the fluid intake opening on the back side. A recessed portion having a rear side wall surface facing the fluid flow direction, the rear wall surface surface facing the fluid flow direction and facing the fluid flow direction, and the left and right sides from the most projected portion. It has an inclined surface that separates and flows the fluid downstream in the flow direction, and forms a stagnation space where the fluid fills in the concave portion where the fluid flows separately on both the left and right sides,
Among pressure-receiving surface of the pressure sensor to measure the fluid pressure between the該淀said fluid intake opening of the viewed space and the inner side wall surface of the upper and lower walls of the recess, or to be present in at least one wall surface A fluid measuring device arranged so as to be close to each other. Wherein one of the upper and lower wall surfaces, provided with at least the opening from the fluid intake opening on the wall of one that extends to the inner side wall surface, a columnar pressure sensor having a pressure receiving surface the one wall surface, said The fluid measuring device according to claim 1, wherein the fluid measuring device is disposed in the columnar body through an opening. While providing an opening in the upper and lower wall surfaces , a columnar pressure sensor having a pressure receiving surface on the one wall surface extending from the fluid intake opening to the back side wall surface side is provided through the opening, respectively. The fluid measuring device according to claim 1, wherein the fluid measuring device is disposed on the upper wall surface side and the lower wall surface side in the columnar body. In the fluid measuring method of measuring fluid using the fluid measuring device according to any one of claims 1 to 3,
Prepare in advance a pressure distribution characteristic for the angle θ when the columnar body is rotated by a predetermined angle around the columnar axis of the columnar body,
The fluid is characterized in that the fluid pressure in the stagnation space is measured while rotating by a predetermined angle about the columnar axis, and the total pressure, static pressure and flow velocity of the fluid are measured based on the peak value of the fluid pressure. Measurement method. In the fluid measuring method of measuring fluid using the fluid measuring device according to any one of claims 1 and 3,
The upper wall surface side in which the flow direction of the fluid with respect to the fluid intake opening is changed by an angle β in the axial direction with the angle θ when the column body is rotated by a predetermined angle about the columnar axis as a parameter in advance, and Prepare the pressure distribution characteristics by a pair of fluid pressure measuring means arranged on the lower wall side,
Measuring the fluid pressure by the pair of fluid pressure measuring means in the stagnation space at the angle θ around the columnar axis of the columnar body;
In addition to the total pressure, static pressure, and flow angle θ of the fluid, the angle β is measured based on the fluid pressure value.

Images