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Peering, Upstream, Downstream | myboat319 boatplans Apr 07, �� If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr. Which way is downstream? �Upstream� is the direction towards the fluid source, or where the fluid is coming from. �Downstream� is the direction where the fluid is going to. The speed of a person rowing boat can be calculated using this simple boat speed upstream downstream formula in this page. This Boat Upstream And Downstream Formula Question formula guides you to calculate the speed of a boat in upstream and downstream based on the speed of the boat in still water and speed of the stream or river flowing at a particular speed. When upstream and downstream speed of boat or swimmer given. As mentioned in the previous two points, the downstream speed and upstream speed of boat or swimmer is (B + S) and (B - S) respectively. Speed of boat or swimmer in still water = 1 2 (Downstream speed .
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In this tutorial, you will see 5 important types of problems. At the end of the tutorial, you will find short online practice test. Let us begin the tutorial now. In this type, you will be finding speed of boat in still water i. You have to remember a very simple formula as shown below.

Find the speed of the boat in still water. Solution: From the question, you can write down the below values. You have to substitute the above values in the below formula. This type is similar to type 1. But there is one difference. Here you have to find speed of stream and not the speed of the boat. You have to use the below formula to find speed of stream. Example Question 2: A man rows downstream 30 km and upstream 12 km.

If he takes 4 hours to cover each distance, then the velocity of the current is:. Solution: In this question, downstream and upstream speeds are not given directly. Hence you have to calculate them first.

Step 3: Calculation of speed of stream You have to substitute values got in steps 1 and 2 in below formula to find the speed of the stream. If using temperature and pressure compensation to derive mass flow, then the temperature and pressure transmitters should be installed downstream of the flowmeter at a minimum of straight pipe diameters.

Coriolis flow meters measure mass flow and density directly. The main guidelines for Coriolis sensors are to make sure the sensor tubes remain full. If installed in a vertical pipe, make sure the fluid liquid and slurries flow up and gasses flow down and do not use the meter to align misaligned pipe. Turbine flow meters must be installed in a manner that minimizes measurement errors caused by turbulence or damage to the moving parts caused by high flow rates.

It is also recommended that a strainer is used upstream of the turbine meter to capture any contaminants that could damage the moving components. Additionally, sufficient back pressure should be maintained to avoid any potential flashing or cavitation. The general guidelines suggested by manufacturers of turbine flow meters are straight pipe diameters inclusive of the strainer straight pipe runs upstream and 5 straight pipe diameters straight pipe runs downstream.

The upstream requirement can increase if, for example, there are two elbows in different planes up to 50 straight pipe diameters. Alternatively, the upstream straight run requirement can be reduced if some form of flow straightening is used, down to 10 straight pipe diameters upstream.

Ultrasonic flow meters require fully developed flow conditions to ensure the meter will perform as specified. There are two basic types of measuring principles, Doppler and Transit Time, with the latter being more commonly used for fiscal custody transfer applications of gas and petroleum liquids.

As with other technologies, these sensors do require adhering to basic installation guidelines to minimize errors caused by flow profile disturbances.

However, these requirements vary by manufacturer, which could lead to some confusion; we have seen recommendations as low as straight pipe runs upstream. If this is a fiscal custody transfer application of either a liquid or gas, then make sure you are fully versed with the current standards that are available, in this case the AGA Report No.

There are a number of professional organizations that offer guidelines and standards for a majority of the flow technologies being used. When in doubt, I would recommend you consult these guidelines as they have been tested and provide a very good starting point to ensure proper flow meter performance.

These are some of the general guidelines to consider when determining proper flow meter placement for your application. By asking the right questions and having a good understanding of the existing guidelines and standards, you should be well on our way to getting the most of your flow meter investment. Our team of flow experts are here to help you assess your application, determine the right equipment, and determine the best installation for optimal performance.

Contact us today to learn more about flow measurement. All rights reserved Privacy Policy Terms of Use. Web Design by Drum Creative. Skip to content. Hose and Fittings. Remember it with DOWN as going down the hill means towards the direction of the force speed of the river.

Type 1 : When the distance covered by boat in downstream is same as the distance covered by boat upstream. The speed of boat in still water is x and speed of stream is y then ratio of time taken in going upstream and downstream is,. It takes him twice as long as to row up as to row down. Find the rate of the stream of the river. A man can row certain distance downstream in 2 hours and returns the same distance upstream in 6 hours.

If the speed of stream is 1. Find the distance between two places? A professional swimmer challenged himself to cross a small river and back. If it took him 15 mins more to cover the distance upstream than downstream, then find the width of the river? Find the average speed of a boat in a round trip between two places 18 km apart.

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