Recent content by mm391

I have a linear actuator operating on an object that, when pressure acts against it, produces a force up to 4000 Newtons. The linear actuator operates with a maximum speed of 11mm/s at no force and a minimum speed at maximum force of 8mm/s. Being a linear actuator the speed decrease linearly...

Thanks. I will look at this.

I am attempting to design a component to remotely control the throttle on a mini petrol powered ATV as a little project. Initially I have had the idea to adapt a standard cruise control unit to do the job but was wondering if anyone had any other suitable ideas? (Obviously this will not go out...

Hello, I am looking to modify/convert a Quad Bike and make it remotely operated and was wondering if anyone had any advice (from a Mechanical Engineering view) on where to start my research or any other advice they could think of with regards to getting the project off the ground. Any help...

By combining the two equations i should be able to solve for u' and get rid of u'': u_(i-1) = u_i + (-h)*u' + 1/2 * (-h)^2 * u'' + O(h^4) u_(i-2) = u_i + (-2h)*u' + 1/2 * (-2h)^2 * u'' + O(h^4) But i keep getting stuck and can't come up with the answer below. Can anyone help me please...

llo, I am looking for some good reliable data of radial and axial velocities of an impinging jet on a perpendicular plate for Reynolds number of between 10,000 and 60,000. I am about to conduct my own experiment using an LDA to measure velocities but am looking for some good data to compare...

Solved. Thanks

Homework Statement In the diagram attached a bar weighs 500 kg and is a 2D plane rigid body with mass centre at G. At the instant shown, the bar is moving horizontally at but reducing speed, causing horizontal deceleration as shown by vector a=-7i m/s2. At the same time, the bar is being...

Hello, I am looking for some help in understanding jet diameter growth due to entrainment. I have an impingement plate positioned approximately 20 cm from the nozzle exit. Is there an equation or information that will allow me to figure out how a free jets diameter grows the further it gets...

Hello, I was wondering if anyone can recommend any good articles or journals with valid and good velocity data for flow from an impinging jet on a flat surface with an approximate Reynolds number of around 75,000 to 90,000? I have looked and seem to have lots of data for heat coefficients but...

I am trying to work out a reynolds number for an impinging jet using air. If I have: μ=1.8*10-5 kg/ms ρ=1.2 kg/m3 Velocity = 90m/s Nozzle Diameter=15mm is it Re = ρ u dh / μ Which is (1.2 kg/m3*90m/s*0.015m)/1.8*10-5 kg/ms Thanks M

Hello, I have to conduct a literature review in regards to Laser Doppler Anemometry and Impinging Air Jet. I am doing a project and it is to compare real velocity data obtained from LDA to CFD data and was wondering if anyone had any good books they could recommend for me to read or good...

Hello, I was hoping someone might be able to help explain what the following are, I have found many articles but non which explain it in Lehman's terms: Probe Volume Bragg Cells Also can someone explain how the effect of varying beam angle is not under our control, but it can tell us...

Hi, I am just about to go into my 3rd year of my Mechanical Engineering Degree and have decided to do a project with the following description: "Laser Doppler Anemometry (LDA) is a non-intrusive technique used to measure flow velocities and turbulence quantities in a fluid flow. The...

Homework Statement I am trying to work out the inverse Laplace transform of t^2*u(t-a). Homework Equations The Attempt at a Solution I have been old that it starts (t-a)^2*u(t-a)... which I understand is substituting for (t-a). But I cannot seem to work out the rest can...